Opinion
The central issue raised in this appeal is whether the interpretation of General Statutes § 18-98d, first announced in a trilogy of cases in 2004, can be applied retroactively to prisoners in custody as of the date of that decision without offending their constitutional or statutory rights. See
Hunter
v.
Commissioner of Correction,
The factual backdrop to this appeal, although somewhat complex, is undisputed and aptly described in the habeas court’s memorandum of decision. “The petitioner was the defendant in a criminal case ([Docket No. *796 CR99-0482356-S], hereinafter ‘docket 1’) in the judicial district of New Haven. The petitioner was arrested and arraigned in [the] docket 1 case on July 23, 1999. The petitioner posted bond that same day and was released.
“The petitioner also was the defendant in a [second] criminal case ([Docket No. CR00-0488977-S], hereinafter ‘docket 2’) in [geographical area number six in the] judicial district of New Haven. The petitioner was arrested and arraigned in [the] docket 2 [case] on March 9, 2000. The petitioner did not post bond and was held in lieu of bond by the respondent. On March 30, 2000, the petitioner posted bond and was released.
“On April 26, 2000, the petitioner became the defendant in two [additional] criminal cases ([Docket Nos. CR00-0289698-T and CR00-0289699-T] . . . ‘dockets 3 and 4,’ respectively) in the judicial district of Waterbury. The petitioner did not post bond [in] either [of the] docket 3 or 4 [cases], and was held in lieu of bond by the respondent.
“On May 17,2000, the petitioner’s bonds in both dockets 1 and 2 were raised so that the petitioner was again held in lieu of bond on those two dockets in addition to dockets 3 and 4.
“On June 14, 2001, the petitioner entered . . . guilty pleas in dockets 1 and 2. The [trial] court. . . accepted the pleas after canvassing the petitioner. The agreed upon total effective sentence for dockets 1 and 2 was three years [imprisonment], to run concurrently with the sentences the petitioner then expected to be imposed in dockets 3 and 4. [The trial court] continued the matters for sentencing to allow the petitioner to resolve dockets 3 and 4 in [the] Waterbury cases and [to] be sentenced there first. The petitioner thereafter would return to New Haven for sentencing [in] dockets 1 and 2.
*797 “Dockets 3 and 4 were not resolved as anticipated. Consequently, the petitioner returned to New Haven on October 31, 2001, for sentencing [in] dockets 1 and 2. [The trial court] imposed the total effective sentence previously indicated, namely three years .... The total effective sentence was comprised of a one year sentence in docket 1, as well as a three year sentence in docket 2, to run concurrently.
“Upon receiving the mittimi for the docket 1 and 2 sentences, the respondent calculated the presentence confinement credit to be applied to each docket.
“On April 14, 2003, the petitioner was sentenced by the court ... [in dockets 3 and 4], In accordance with a plea agreement, the petitioner was sentenced to seven years [imprisonment], of which five years is a mandatory minimum, to run concurrently with sentences then being served [in connection with dockets 1 and 2]. 1 The judgment mittimus contained] no order pertaining to presentence confinement credit.
“The time sheet maintained by the respondent for docket 1 shows that, on October 31, 2001, the respondent posted 364 days of presentence confinement credit to the docket 1 sentence. While the petitioner had been held in lieu of bond [in] docket 1 from May 17, 2000, until he was sentenced on October 31, 2001, the one year sentence was less than the time held in lieu of bond. Consequently, the petitioner essentially discharged upon sentencing [in] the docket 1 [case]. The time held in lieu of bond satisfied the petitioner’s term of incarceration for that docket. . . .
“The time sheet maintained by the respondent for docket 2 shows that, on October 31, 2001, the respon *798 dent posted 554 days of presentence confinement credit to the docket 2 sentence. The 554 days represent the time periods of March 9, 2000, through March 30, 2000, and May 17, 2000, through October 31, 2001. The application of that credit resulted in a release date from the docket 2 sentence of April 25, 2003. . . .
“The time sheet maintained by the respondent for docket 3 shows that, upon being sentenced on April 14, 2003, the respondent initially did not post any presentence confinement credit to docket 3. A subsequent posting, dated April 24, 2003, shows, however, that the respondent credited 553 days of presentence confinement credit to docket 3. The 553 days represent the time period of April 26, 2000, through October 31, 2001. The application of that credit resulted in a release date from the docket 3 sentence of October 7, 2008. . . .
“The time sheet for docket 2 shows that, on April 24, 2003, the respondent posted a reduction of 532 days of presentence confinement credit. That posting bears the following notation: ‘5/17/00-10/31/01 MOVED TO SEQ 6 & 7.’ As a result of this reduction, the release date from the docket 2 sentence changed from April 25,2003, to October 8, 2004. 2 . . .
“The time sheets for dockets 2 and 3 show postings dated February 23,2005, accompanied by the following entry: ‘SC 11/04 JC REVIEW.’ On November 30,2004, the Connecticut Supreme Court released a trio of decisions pertaining to the application of presentence confinement credit, namely [Harris, Cox and Hunter]. Thus, the entry ‘SC 11/04 JC REVIEW’signifies that the respondent conducted a review of jail credit (i.e., presentence confinement credit) as a result of, and pursuant *799 to, the November, 2004 Supreme Court decisions in Harris, Cox and Hunter. . . .
“As a result of the jail credit review performed on dockets 2 and 3, any jail credits moved to docket 3 were removed and again applied to the docket they had first been applied to immediately after sentencing. Consequently, 532 days of presentence confinement credit were moved from docket 3 to docket 2, thereby advancing the release date on docket 2 from October 8, 2004, to April 25, 2003. . . .
“The removal of 532 days of presentence confinement credit from docket 3 altered the release date [of] that sentence from October 7, 2008, to March 23, 2010. The only presentence confinement credit remaining on docket 3 was the credit for twenty-one days for the time period of April 26, 2000, to May 17, 2000. . . .
“The petitioner has been continuously confined, held either in lieu of bond or as a sentenced prisoner, from April 26,2000, to the present.” (Citations omitted.) Additional facts will be set forth as necessary.
The habeas court concluded that the petitioner could not demonstrate any injustice to warrant the issuance of habeas relief and, therefore, rendered judgment denying the habeas petition. Thereafter, the petitioner sought certification to appeal, which the habeas court granted as to all of the petitioner’s claims. On the granting of certification, the petitioner appealed to the Appellate Court, and we transferred the appeal to this court pursuant to General Statutes § 51-199 (c) and Practice Book § 65-1.
We begin by setting forth the appropriate standard of review. “Although a habeas court’s findings of fact are reviewed under a clearly erroneous standard of review, questions of law are subject to plenary review. . . . [When] the material facts are not in dispute and the issues before us present questions of law, our review
*800
is plenary.” (Citation omitted; internal quotation marks omitted.)
Harris
v.
Commissioner of Correction,
supra,
In order to address properly the merits of the petitioner’s claims, some background as to the relevant statutory scheme and case law pertaining to presentence confinement credit is helpful. Section 18-98d governs the issuance of jail credit to prisoners incarcerated prior to sentencing. Subsection (a) creates a right to credit for days spent in prison prior to sentencing. General Statutes § 18-98d (a) (1) provides in relevant part: “Any person who is confined . . . under a mittimus or because such person is unable to obtain bail or is denied bail shall, if subsequently imprisoned, earn a reduction of such person’s sentence equal to the number of days which such person spent in such facility from the time such person was placed in presentence confinement to the time such person began serving the term of imprisonment imposed . . . .” The statute, however, expressly limits the credit a prisoner may receive because it provides that “each day of presentence confinement shall be counted only once for the purpose of reducing all sentences imposed after such presentence confinement . . . .” (Emphasis added.) General Statutes § 18-98d (a) (1) (A). The statute also excludes from this credit any time that a prisoner spends incarcerated for a prior conviction before sentencing on a separate, pending charge. See General Statutes § 18-98d (a) (1) (B). Finally, subsection (c) of § 18-98d 3 charges the *801 respondent with the responsibility for correctly applying presentence confinement credit to a prisoner’s sentence.
Section 18-98d provides only part of the relevant statutory guidance in the present case. Because a sentencing court may order sentences to be served concurrently, we also must consider the language of General Statutes § 53a-38 (b). That statute provides in relevant part: “Where a person is under more than one definite sentence, the sentences shall be calculated as follows: (1) If the sentences run concurrently, the terms merge in and are satisfied by discharge of the term which has the longest term to run . . . .” (Emphasis added.) General Statutes § 53a-38 (b).
Our case law illustrates the interaction of these statutory provisions, which defines the process by which the respondent calculates a prisoner’s anticipated release date. See, e.g.,
Hunter v. Commissioner of Correction,
supra,
*802 Prior to our decisions in Harris, Cox and Hunter, we had commented once before on the correct application of presentence confinement credit to a prisoner’s concurrent sentences. In Payton v. Albert, supra, 209 Com. 32, we approved the application of presentence confinement credit, earned simultaneously on multiple charges, to all concurrent sentences imposed on the same day. Although we noted our approval of this practice, it was not the central issue in Payton. Rather, Payton required us to resolve whether a prisoner may “bank” presentence confinement credit earned in connection with one charge for later application to another, unrelated sentence. (Internal quotation marks omitted.) Id., 33; see id., 29-32. We concluded that such application of presentence confinement credit was not permitted under §§ 18-98d (a) and 53a-38 (b). Id., 29-32. In Harris, we distinguished Payton from situations in which a prisoner has been ordered to serve concurrent sentences that were imposed on different days. See Harris v. Commissioner of Correction, supra, 271 Com. 823. We observed that, “[w]hen concurrent sentences are imposed on the same date, as in Payton, the available presentence confinement days have not yet been utilized. . . . Conversely, when concurrent sentences are imposed on different dates, the presentence confinement days accrued simultaneously on more than one docket are utilized fully on the date that they are applied to the first sentence.” (Citation omitted; emphasis added.) Id.
In
Harris,
we announced for the first time our conclusion that § 18-98d (a) prohibits the respondent from crediting multiple sentences, imposed on different days, with the same presentence confinement when a prisoner had been imprisoned simultaneously in multiple dockets. See id. Although our decision in
Cox
was governed by this conclusion, in that case, we further determined that once the respondent has applied
*803
presentence confinement credit to a prisoner’s first imposed sentence, the credit has been fully utilized. See
Cox
v.
Commissioner of Correction,
supra,
As a preliminary matter, we note that the petitioner raises both constitutional and statutorily based claims. “Ordinarily, [constitutional issues are not considered unless absolutely necessary to the decision of a case.” (Internal quotation marks omitted.)
Bauer
v.
Waste Management of Connecticut, Inc., 234
Conn. 221, 230,
I
The petitioner first claims that the respondent’s retroactive application of the interpretation of § 18-98d that we announced in Harris, by virtue of the respondent’s recalculation of the petitioner’s presentence confine *804 ment credit, violates due process. 5 Specifically, the petitioner contends that our judicial construction of § 18-98d, as applied to him, operates as the functional equivalent of an ex post facto law that has lengthened his sentence unconstitutionally. 6 We note that the respondent’s brief contains no counterargument to this due process claim. At oral argument before this court, however, the respondent claimed that (1) the petitioner has no liberty interest in presentence confinement credit, or the procedure by which it is credited, that would implicate the due process clause of the fourteenth amendment, (2) this court’s interpretation of § 18-98d cannot violate due process by operating as an ex post facto law because § 18-98d is not a penal statute, (3) the court’s decisions in Harris, Cox and Hunter did not enlarge the meaning of § 18-98d but, rather, clarified the meaning of the statute and corrected a misunderstanding on the part of the respondent, and (4) the petitioner’s sentence has not been lengthened because, although he may not have received credit in a manner that he would prefer, he has received credit for every day he spent in presentence confinement. We conclude that our decisions in Harris, Cox and Hunter did not constitute a “change in the law” but, rather, corrected the respondent’s misinterpretation of the law. Moreover, we conclude that such correction was foreseeable and does not support an ex post facto claim. 7
*805 In response to the petitioner’s claim that retroactive application of these decisions had the practical effect of increasing his punishment, the habeas court concluded: “[T]he petitioner’s assertion that his term of confinement for docket 3 has somehow been lengthened is incorrect. Additionally, the claim that the respondent is retroactively applying the Supreme Court’s construction of a criminal statute in Cox in no way takes into consideration the respondent’s statutoiy duty to determine the appropriate amount of presentence confinement [credit] to be applied. . . . This statutory requirement exists for the duration of [the] inmate’s total term of confinement.” (Citation omitted.)
We begin with the law governing due process violations predicated on the theory that the retroactive application of a court’s statutory construction operates like an ex post facto law. “The ex post facto prohibition forbids the Congress and the [s]tates to enact any law which imposes a punishment for an act which was not punishable at the time it was committed ... or imposes additional punishment to that then prescribed. . . . Through this prohibition, the [fjramers sought to assure that legislative [a]cts give fair warning of their effect and permit individuals to rely on their meaning until explicitly changed.” (Citations omitted; internal quotation marks omitted.)
Weaver
v.
Graham,
The United States Supreme Court has observed, “[a]s the text of the [ex post facto] [c]lause makes clear, it is a limitation upon the powers of the [legislature, and does not of its own force apply to the [j]udicial [b]ranch
*806
of government.” (Internal quotation marks omitted.)
Rogers
v.
Tennessee,
It is significant to note that the petitioner in the present case does not argue that our decisions in Harris, Cox and Hunter altered the definition of the crimes with which he was charged or altered the potential sentences prescribed by statute that may be imposed upon conviction of those crimes. Rather, the crux of the petitioner’s due process claim is that, as a result of our interpretation of § 18-98d announced in those three decisions, the respondent, the head of an administrative agency, altered the practice of calculating inmates’ release dates and that this altered practice was unconstitutionally applied to him. We disagree because the respondent altered the agency’s practice to correct its prior misinterpretation of the law. Moreover, we conclude that our decisions in these cases were not unforeseeable or indefensible, and, in reaching this conclusion, we are persuaded by a series of cases that explicitly have rejected similar claims.
*807
We note that a District of Columbia Court of Appeals case,
Davis
v.
Moore,
In keeping with its rejection of the petitioners’ ex post facto claims, the court in
Davis
also rejected the petitioners’ related
Bouie
claims. The petitioners in
Davis
argued that the court’s construction of the District of Columbia Good Time Credits Act of 1986 in
Noble
“was so unexpected and contrary to the prevailing view that it would offend due process to apply [the] holding retroactively.”
Davis
v.
Moore,
supra,
In the present case, the petitioner claims that “[t]he Harris trilogy introduced a new judicial interpretation of § 18-98d. This interpretation enlarged the meaning of the statute by incorporating an unwritten requirement that [presentence confinement] credit simultaneously accrued under multiple docket numbers if applied to the first sentence imposed cannot be removed and applied to any subsequent sentence. This interpretation was unforeseeable and indefensible in light of the law expressed prior to the Harris trilogy.” We disagree.
First, to the extent that the petitioner suggests that
Harris, Cox
and
Hunter
represented a change in the law, we do not agree.
Harris
involved a question of first impression for this court. We did not overrule a prior decision but, rather, were called on to construe the meaning of § 18-98d as applied to the petitioner’s particular factual circumstances. See
Harris
v.
Commissioner of Correction,
supra,
Second, the petitioner also argues that the respondent’s interpretation of the statute should be afforded great deference, especially since its practices were aligned with an opinion provided by the office of the attorney general. In support of this contention, the petitioner relies on our decision in
Sutton
v.
Lopes,
201
*812
Conn. 115,
Third, the petitioner claims that the
Harris
trilogy was unexpected and indefensible because “prior to the
Harris
trilogy,
Payton . . .
was the acknowledged controlling authority on the calculation of simultaneously accrued [presentence confinement] credit in the context of concurrent sentences.” We expressly rejected this broad reading of
Payton
in
Harris.
Id. Prior to
Harris,
we never had addressed the proper application of presentence confinement credit to concurrent sentences imposed on different days. The petitioner asserts
*813
that, despite the distinguishing factual circumstances of
Payton,
“there was no Supreme Court or Appellate Court opinion subsequent to
Payton
that suggested that the application of the
Payton
method was not applicable to concurrent sentences imposed on different days.” Contrary to the petitioner’s argument, however, our decision in
Harris
resolved a series of conflicting holdings of our Appellate Court with respect to § 18-98d. In
Valle
v.
Commissioner of Correction,
Finally, we note that, following the Appellate Court’s decision in
Valle,
we granted a petition for certification to appeal in order to resolve the issue of whether “the Appellate Court properly conclude[d] that a prisoner serving multiple concurrent sentences imposed by different courts on different dates is entitled to have presentence confinement credit applied to each of these sentences when that credit represents the same period of presentence confinement . . . .”
Valle
v.
Commis
*815
sioner of Correction,
II
The petitioner next claims that he was denied his statutory right to presentence confinement credit. He contends that, as a result of the respondent’s recalculation of inmates’ release dates in the wake of Harris, Cox and Hunter, “[none] of the petitioner’s sentences was reduced by the 532 days [that the] petitioner spent incarcerated in lieu of bond” because “[presentence confinement] credit was not ‘utilized’ . . . unless it actually reduced [the petitioner’s] sentence . . . prior to the petitioner’s discharging that sentence.” (Emphasis in original.) The respondent counters that, “in accordance with the holdings of Harris, Hunter and Cox, [she] never had the authority to transfer the 532 days of presentence [confinement] credit from [the] petitioner’s initial three year sentence to his subsequently imposed seven year sentence. The respondent, therefore, had no choice but to correct [the] error.” We agree with the respondent and conclude that the petitioner’s presentence confinement credit was fully utilized when applied to dockets 1 and 2 upon imposition of those sentences.
We begin by noting our agreement with the habeas court’s findings. In its memorandum of decision, the *816 habeas court relied on our decision in Cox and concluded that the “respondent’s correction performed February 23, 2005 . . . [was] part of an ongoing statutory duty to correctly calculate and post presentence confinement [credit] . . . [and it] only served to correct a calculation and posting method found errant by Cox. The petitioner has not been deprived of any presentence confinement [credit].” (Citation omitted.)
Because we concluded in part I of this opinion that
Harris, Cox
and
Hunter
may be applied retroactively to the petitioner, our resolution of this statutoiy claim is controlled by our decision in
Cox.
In that case, the petitioner had been held in lieu of bond simultaneously under two separate dockets, one in Bridgeport and the other in Milford.
Cox
v.
Commissioner of Correction,
supra,
During the petitioner’s habeas hearing in Cox, a records specialist for the respondent testified that the respondent “did not credit the Milford sentence with the . . . days of presentence confinement that the petitioner had served simultaneously [in the Bridgeport and Milford cases] because to do so would have violated § 18-98d (a) (1) (A) .... Consequently, the only days of presentence confinement available to apply to the Milford sentence were the . . . days that the petitioner *817 had served [in connection with] the Milford [case only] . . . .” Id., 849. According to the record in Cox, however, seven months after the initial calculation, the respondent recognized that “it would be to the petitioner’s benefit” to transfer the presentence confinement credit from the Bridgeport sentence and apply it to the Milford sentence. As a result of the transfer of credit, the anticipated release date on the Bridgeport sentence was extended to December 17, 2003, and the release date on the Milford sentence was advanced to August 29, 2003. Once the credit was transferred and applied in such a manner, the Bridgeport sentence became the controlling sentence, and the petitioner’s overall release date was advanced by one month. Id., 849-50.
The petitioner in Cox filed a writ of habeas corpus challenging the respondent’s failure to credit both sentences with the presentence confinement credit that had been earned simultaneously in both cases. Id., 850. According to the petitioner’s claim, if the credit had been applied to both sentences, his release date would have been advanced by three and one-half months. Id. We disagreed and concluded that “[o]ur interpretation of § 18-98d (a) (1) (A) does not permit the respondent to credit the petitioner’s Milford sentence with the . . . days of presentence confinement that he served simultaneously [in] the Milford and Bridgeport [cases] . . . because those days were fully utilized when they were credited to the Bridgeport sentence.” Id., 853. Thus, the respondent’s transfer of credit was improper. See id. Furthermore, although the August 29, 2003 release date for the Milford sentence that had been calculated in violation of § 18-98d (a) already had passed, thereby arguably discharging the petitioner’s Milford sentence; see id.; we ordered the respondent to recalculate the credit in accordance with its original application, thus reinstating the original release date of January 17, 2004. See id., 855.
*818 We conclude in the present case, as we did in Cox, that the respondent’s calculation of the petitioner’s discharge date under dockets 1 and 2 that was performed upon imposition of those sentences was correct and that the petitioner has not been deprived of the benefit of his presentence confinement credit. First, the respondent added to the sentencing date the respective one year term for docket 1 and the three year term for docket 2. Then, in accordance with our decision in Payton, because the petitioner was in presentence confinement simultaneously on dockets 1 and 2, and the sentences were imposed on the same day, the respondent credited 364 days of presentence confinement to the docket 1 sentence, effectively discharging it. 11 Next, the petitioner credited 554 days of presentence confinement to the docket 2 sentence, which, at that time, clearly was the controlling sentence. The respondent utilized the petitioner’s presentence confinement credit correctly to arrive at an anticipated release date of April 25, 2003.
Prior to the discharge of the sentence in docket 2, the petitioner pleaded guilty in dockets 3 and 4, and received additional seven year sentences in each case to run concurrently with each other and with his existing sentence in docket 2. 12 Because the presentence confinement credit that had accrued simultaneously on all *819 dockets already had been utilized and applied to the docket 1 and 2 sentences, the respondent’s record reveals that when the seven year sentence in the docket 3 and 4 cases was imposed on April 14, 2003, none of the petitioner’s presentence confinement credit was applied to that new sentence. 13 The petitioner was ordered to serve the sentences concurrently, and, therefore, the respondent merged the sentences, concluded that the new seven year sentence was the controlling sentence, and calculated the petitioner’s anticipated release date as March 23, 2010.
As we previously noted, subsequent to this calculation, the respondent transferred the presentence confinement credit from dockets 1 and 2 and applied it to dockets 3 and 4 to ensure the maximum benefit to the petitioner. In doing so, however, the respondent transferred credit that
already had been utilized
in connection with the petitioner’s sentences in dockets 1 and 2 and applied it to the sentence in dockets 3 and 4, thereby incorrectly advancing the petitioner’s anticipated release date to October 7, 2008. As we recognized in
Cox,
§ 18-98d
does not permit
the respondent to conduct such a recalculation. See
Cox
v.
Commis
*820
sioner of
Correction, supra,
*821 We further note that there is no merit to the petitioner’s assertion that his presentence confinement credit never was “utilized” because he never “received the benefit” of the credit since the improperly calculated October 8, 2004 discharge date had passed prior to the respondent’s correction of the error. We fail to see what “benefit” was denied to him. The petitioner argues that “those 532 days of [presentence confinement] credit have not been applied to either of his sentences to actually advance his release dates.” (Emphasis added.) In the context of multiple concurrent sentences, however, the right to presentence confinement credit is not the right to have a release date actually advanced because § 53a-38 (b) mandates that concurrent sentences be merged with the sentence with the longest term to run after the term of the sentence has been determined, i.e., reduced by any applicable presentence confinement credit or presentence good time credit.
In the present case, regardless of the application of the petitioner’s presentence confinement credit to the docket 1 and 2 sentences, the longest term to run was the sentence imposed in connection with dockets 3 and 4.
16
Therefore, although the petitioner
believed
that the
*822
docket 1 and 2 sentences did not discharge until October 8, 2004, they actually discharged on April 25, 2003, because the respondent’s transfer of presentence confinement credit to the docket 3 and 4 sentence was improper under § 18-98d. We conclude that the petitioner is in no worse a position than when his credit first was applied to his docket 1 and 2 sentences. The record contains the corrected official discharge date, and the petitioner’s anticipated release date in 2010 was calculated in accordance with § 18-98d. Contrary to the claim of the petitioner, his sentence has in no manner been increased. See
State
v.
Johnson,
Ill
The petitioner next claims that the respondent’s application of his presentence confinement credit violates the double jeopardy clause of the federal constitution. 17 The gravamen of the petitioner’s complaint in this regard is that “applying jail credit to a concurrent sentence served and discharged serves to lengthen that sentence by the amount of jail credit not timely applied,” and, therefore, “the petitioner’s [sentences in dockets 1 and 2 were] impermissibly altered after [they were] served.” The respondent contends that “none of the petitioner’s criminal sentences were lengthened in any manner by the application or deduction of pretrial [confinement credit]. . . . [T]he fact that the respondent complied with a decision of [this] [c]ourt may have *824 affected the time spent by [the petitioner] in prison on each docket. Such a fact, however, in no manner means that he was tried twice for any crime, or penalized criminally, in any way.” We agree with the respondent.
We begin by noting that the habeas court found this claim to be “entirely without merit” and concluded that “[t]he sentence served in each docket . . . does not exceed the sentence imposed by the [trial] court. None of the petitioner’s sentences at issue [has] been modified or altered. Application of presentence confinement credit does not alter an imposed sentence. Furthermore, the continuous term of confinement created by the merger of the concurrent terms of confinement results in a total effective term of imprisonment. The petitioner . . . never discharged from the respondent’s custody and remains . . . confined as a result of the total effective term of imprisonment. The court fails to discern even a theoretical double jeopardy violation.” (Emphasis added.)
We note that, for this claim to be meritorious, it is necessary to accept the petitioner’s assertion that he never received presentence confinement credit for the sentences imposed in dockets 1 and 2. Because we concluded in part I of this opinion that the respondent’s correction of her earlier misinterpretation of § 18-98d did not violate the petitioner’s due process rights and in part II of this opinion that the petitioner did receive the proper presentence confinement credit for the sentences in dockets 1 and 2, he cannot prevail on this claim. The basis of the petitioner’s alleged double jeopardy violation is that, by applying presentence confinement credit to an already discharged sentence, the state exacted a greater punishment for his docket 1 and 2 offenses than the trial court imposed. Our foregoing conclusions that presentence confinement credit was applied properly prior to discharge and that the respon *825 dent lawfully rectified a subsequent, mistaken transfer of credit necessarily defeats the petitioner’s claim.
IV
The petitioner’s next claim is that the trial court violated the separation of powers doctrine because it “abdicated its responsibility and delegated its authority to [the respondent] when it refused to order credit on the basis that [the respondent] must determine the application of [presentence confinement] credit.” Specifically, the petitioner contends that the respondent must apply presentence confinement credit “as ordered by the trial court even if the detainee has no constitutional or statutory entitlement to such credit.” Conversely, the respondent characterizes the petitioner’s claim as suggesting that “the respondent is imposing a criminal sentence in some manner by calculating pretrial [confinement credit] of the petitioner. Such a contention . . . has always been rejected by the courts of this state.” 18 We conclude that the trial court properly imposed the petitioner’s sentences and properly acknowledged the respondent’s administrative duty to adjust the term imposed by the applicable presentence confinement credit.
The following additional facts pertain to resolution of this claim. Before the petitioner entered pleas of guilty in dockets 3 and 4, the petitioner’s attorney discussed presentence confinement credit with the trial court at a pretrial conference. Specifically, the petitioner’s attorney requested that the court specify in the mittimus that the respondent should give the petitioner “total credit for all the time, everything, all presentence *826 incarceration time.” According to the petitioner’s trial counsel, who testified at the habeas hearing, the judge would not agree “because his feeling was that it’s up to the [respondent] to make those determinations.” The petitioner’s trial counsel testified that, “I think [the judge] might have made a general reference on the bench . . . that jail credits will be left to the [respondent] to calculate.” After the trial judge accepted the petitioner’s guilty pleas in dockets 3 and 4, and imposed a total effective sentence of seven years, the petitioner asked the trial judge: “I have been locked up for this case since 2000. Does all the time I had in for this count for this?” The trial court replied: “I don’t think so. You have to talk to [your counsel]. Whenever you plead guilty to the other charges, you have three years. You probably lost any time you had in at that point. You can talk to [your counsel] about that, and he can check with the [respondent] for you.”
In its memorandum of decision, the habeas court rejected the petitioner’s separation of powers claim. The habeas court concluded that the trial court “sentenced the petitioner in accordance with [General Statutes] §§ 53a-28 (b) (sentences court shall impose for convictions) and 53a-37 (requirement that court state whether sentence is concurrent or consecutive when there are multiple sentences). The respondent has striven, on the other hand, to comply with the requirements of § 18-98d (c) [by] ensuring the petitioner received the correct reduction of his sentences by applying the appropriate amount of presentence confinement credit to each docket. . . . [C]ontrary to the petitioner’s claim . . . such separation of authority is the cornerstone of the separation of powers doctrine.”
Article second of the constitution of Connecticut, as amended by article eighteen of the amendments, provides in relevant part: “The powers of government shall be divided into three distinct departments, and
*827
each of them confided to a separate magistracy, to wit, those which are legislative, to one; those which are executive, to another; and those which are judicial, to another. ...” We have recognized that “[t]he primary purpose of [the separation of powers] doctrine is to prevent commingling of different powers of government in the same hands. . . . The constitution achieves this purpose by prescribing limitations and duties for each branch that are essential to each branch’s independence and performance of assigned powers. ... It is axiomatic that no branch of government organized under a constitution may exercise any power that is not explicitly bestowed by that constitution or that is not essential to the exercise thereof.” (Internal quotation marks omitted.)
State
v.
McCahill,
The petitioner’s claim is aimed specifically at the powers assigned to the judicial branch and his allegation that the trial court delegated a “strictly judicial function” of sentencing to the executive branch when it deferred to the respondent for the proper calculation and application of the petitioner’s presentence confinement credit. The petitioner purports to quote our decision in
State
v.
Clemente,
With respect to our criminal justice system, we have recognized that there are duties and responsibilities that are dedicated to each of our three branches of government. We have acknowledged the legislature’s authority to define crimes and the appropriate penalties for them. E.g.,
State
v.
Breton,
*830 The petitioner additionally argues that “[t]he trial court . . . imposed a seven year sentence, but because it left the issue of jail credit unanswered, the petitioner is serving not seven years in prison but seven years and 532 days. This is not the sentence the court imposed . . . nor the sentence the petitioner agreed to when he entered into his plea agreement. It is, instead, the sentence the [respondent] determined the petitioner will serve after Harris, Cox and Hunter.” This contention is premised on the erroneous assumption that, pursuant to § 18-98d, the petitioner is entitled to have the 532 days of presentence confinement credit applied to his sentences in such a manner as to actually advance his release date from prison. As we previously noted in part II of this opinion, however, § 18-98d does not entitle the petitioner to that treatment but merely confers on him a right to have any days spent in presentence confinement applied once, upon imposition, to reduce the sentences imposed. The petitioner received the 532 days of presentence confinement credit to which he was entitled on his docket 1 and 2 sentences when the trial court imposed those sentences.
V
Because we concluded in part I of this opinion that the retroactive application of Harris, Cox and Hunter does not violate the petitioner’s due process rights, we now address the petitioner’s alternative claim that his trial counsel rendered ineffective assistance in failing to foresee our interpretation of § 18-98d announced in *831 those cases and in failing “to ensure the plea and sentence conformed to the petitioner’s understanding . . . .” The respondent argues in response that (1) the claim is not reviewable because the petitioner has raised the issue of counsel’s failure to foresee our interpretation of § 18-98d in Harris for the first time on appeal, (2) even if the claim is reviewable, the petitioner’s counsel was effective because he acted reasonably in response to his client’s concerns and “his advice accurately reflected the then-existing interpretation of the law,” and (3) “[a]n overwhelming collection of case law” rejects claims that a counsel’s failure to forecast changes or advances in the law constitutes ineffective assistance. We conclude that the petitioner’s claim is properly before us but agree with the habeas court that the petitioner’s trial counsel did not render ineffective assistance.
The following additional facts are relevant to resolution of this claim. Prior to the petitioner’s agreement to plead guilty in dockets 3 and 4, his counsel was replaced. When Attorney Richard Lafferty began to represent the petitioner, the state initially offered to recommend a sentence of twelve years imprisonment and then ten years. Lafferty was able to renegotiate with the state and secured an offer of seven years imprisonment to be served concurrently with the petitioner’s existing sentences. Lafferty was aware of the time that the petitioner had spent in presentence confinement and was aware that the petitioner was concerned about getting credit for that time applied to his sentence in dockets 3 and 4. In response to these concerns, Lafferty contacted an employee of the respondent to inquire about the credit that would be applied to the petitioner’s sentence in dockets 3 and 4. The employee with whom Lafferty spoke informed him that the respondent’s policy would result in a transfer of the credit from his existing sentences in dockets 1 and 2 to the sentence *832 in dockets 3 and 4 because the latter sentence had the longest term to run and, therefore, the credits so applied would result in the maximum benefit to the petitioner. Lafferty informed the petitioner of his discussion with the respondent’s employee and communicated his understanding that the respondent would apply the petitioner’s presentence confinement credit to the seven year sentence imposed in connection with dockets 3 and 4. Additionally, at a pretrial conference, Lafferty requested that the trial court order the transfer of the credit at the petitioner’s sentencing hearing. The trial court declined to do so, however, and Lafferty informed the petitioner that the court left the determination of applicable credit to the respondent. Lafferty did not renew his request on the record during the sentencing hearing and did not object to the trial court’s denial of his request. As we noted in part IV of this opinion, the petitioner did ask the trial court about his presentence confinement credit and that the court informed him that the respondent would be in charge of calculating any presentence credit to which he would be entitled.
It is well settled that to prevail on a claim of ineffective assistance of counsel, a petitioner must satisfy the two-pronged test set forth in
Strickland
v. Washington,
With respect to the petitioner’s claim of ineffective assistance, we first must address the respondent’s claim that it is not properly before this court. Generally, parties are prohibited from raising new issues for the first time on appeal. See, e.g.,
Bell Atlantic Mobile, Inc.
v.
Dept. of Public Utility Control,
In its memorandum of decision, the habeas court rejected the petitioner’s claim of ineffective assistance of counsel and concluded that the petitioner had failed to satisfy either the performance prong or the prejudice prong of Strickland. With respect to Attorney Lafferty’s performance, the court found: “Even though Attorney Lafferty’s advice to the petitioner regarding jail credit he would receive now is known to be faulty, at the time he proffered this advice, it was entirely consistent with the respondent’s implementation of [§ 18-98d]. The respondent . . . did post the credits [that] Attorney Lafferty advised the petitioner he would receive, in spite of the fact that [the trial court] would not order such credits and the judgment mittimus indicated no court-ordered jail credits.
“Given the foregoing, this court cannot find that Attorney Lafferty’s performance was deficient at the time he represented and advised the petitioner. It is clear that [the trial court] had no intention of ordering that the petitioner receive the jail credit. An inquiry or request made by Attorney Lafferty at the sentencing [hearing] would have accomplished nothing more than the petitioner’s own inquiry. Furthermore, Attorney Lafferty’s advice was consistent with the respondent’s implemented policy up until the release of the applicable Supreme Court decisions [of Harris, Cox and Hunter) in late 2004.”
With respect to the prejudice prong of Strickland, the habeas court found that the petitioner had “completely failed to affirmatively prove the prejudice prong. The *835 petitioner’s potential maximum sentence for [dockets 3 and 4] was forty . . . years, with a potential fine of $10,000. ... It is quite evident from the colloquy between [the trial court] and the petitioner that the petitioner did not want to proceed to trial. . . . [The] court fails to see how the petitioner has in any way affirmatively shown that there is a reasonable probability that, but for counsel’s presumed errors, he would not have pleaded guilty and would have insisted on going to trial.” (Citations omitted.)
We first note that the petitioner misstates the prejudice prong of
Strickland
that applies to cases in which a defendant has opted to plead guilty. He claims that there is a reasonable probability that the result of the trial court proceedings would have been different and that he would be serving seven years from the date of being held in presentence confinement. In the context of a guilty plea, however, to succeed on the prejudice prong, the petitioner must demonstrate that, but for counsel’s alleged ineffective performance, the petitioner would not have pleaded guilty and would have proceeded to trial. E.g.,
Crawford
v.
Commissioner of Correction,
supra,
The judgment is affirmed.
In this opinion the other justices concurred.
Notes
We note that the petitioner pleaded guilty in dockets 3 and 4. After accepting the plea agreement that the petitioner had arranged with the state, the court sentenced the petitioner to seven years in each of these two dockets and ordered the sentences to run concurrently.
“A similar reduction of 342 days was posted to the docket 1 sentence on October 31, 2001. . . . The reduction was later rescinded on February 23, 2005, similar to the rescinding of the docket 2 reduction.” (Citation omitted.)
General Statutes § 18-98d (c) provides in relevant part: “The Commissioner of Correction shall be responsible for ensuring that each person . . . receives the correct reduction in such person’s sentence . . . .”
It is well settled that the determination of a prisoner’s release date is not a “static concept” and often requires recalculation by the respondent during the term of a prisoner’s sentence. See, e.g.,
Tyson
v.
Commissioner of Correction,
We note that the petitioner raised an additional due process claim before the habeas court. He claimed that his due process rights were violated because he was deprived of the benefit of his plea bargain. The habeas court found for the respondent on this claim, and the petitioner has not raised this issue on appeal.
The constitution of the United States, article one, § 10, provides in relevant part: “No State shall . . . pass any ... ex post facto Law . . . .”
We note that whether § 18-98d is a penal statute for the purposes of ex post facto analysis is an open question in our jurisprudence. Even if we assume, arguendo, that it is a penal statute, for the reasons set forth in the text of this opinion, the petitioner has not demonstrated that his due process rights were violated by retroactive application of our decisions in Harris, Cox and Hunter.
In
Caballery
v.
United States Parole Commission,
supra,
We note the “well established principles of statutory construction designed to further our fundamental objective of ascertaining and giving effect to the apparent intent of the legislature. ... In other words, we seek to determine, in a reasoned manner, the meaning of the statutory language as applied to the facts of this case .... In seeking to determine that meaning, we look to the words of the statute itself, to the legislative history and circumstances surrounding its enactment, to the legislative policy it was designed to implement, and to its relationship to existing legislation and common law principles governing the same general subject matter.” (Citation omitted; internal quotation marks omitted.)
Education Assn. of Clinton
v.
Board of
Education,
The petitioner contends that the AppeEate Court’s decisions in
King
and
Torrice,
as well as
Mirault
v.
Commissioner of Correction,
Although the petitioner had been held in lieu of bond longer than 364 days, we previously have concluded that a petitioner cannot “bank” presentence confinement credit for application to another sentence. See
Payton
v.
Albert,
supra,
In the interest of simplicity, we hereinafter refer to the concurrent seven year sentences imposed in dockets 3 and 4 as one seven year sentence. Because those sentences have the same seven year term and were ordered to be served concurrently with each other, the application of presentence confinement credit under § 18-98d would be the same regardless of whether there was one seven year sentence or two concurrent seven year sentences imposed on the same day, as in the present case.
We note that the petitioner argues in his brief that § 18-98d “does not dictate in what order or manner [presentence confinement] credit accrued simultaneously under different dockets must be applied . . . We disagree. When a petitioner is sentenced for multiple convictions on different days, upon sentencing for the first conviction, his incarceration ceases to be that of “presentence confinement” within the meaning of § 18-98d because that provision provides that it “shall only apply to a person for whom the existence of a mittimus, an inability to obtain bail or the denial of bail is the sole reason for such person’s presentence confinement . . . .” General Statutes § 18-98d (a) (1) (B). Furthermore, upon sentencing, the petitioner is entitled to have the respondent correctly calculate his sentence, which includes the proper crediting of days spent in presentence confinement. See General Statutes § 18-98d (c). When sentences are imposed on different days, the respondent’s responsibility arises upon imposition of the first sentence, and the statute expressly dictates that the credit may be used only once for all sentences. General Statutes § 18-98d (a) (1) (A).
The petitioner argues that the respondent cited no authority in support of the assertion that the respondent had a duty to correct the mistake upon learning that the transfer of presentence confinement credit violated § 18-98d. The petitioner fails to recognize, however, that the authority that the respondent cites is the statute itself. The petitioner acknowledges that the language of § 18-98d is “mandatory language,” as evidenced by the legislature’s use of the word “shall,” and that the statute “assures” that presentence confinement credit “will be applied.” We agree and further note that the legislature employed the same “mandatory language” in subsection (c) of § 18-98d to mandate that the respondent correctly calculate a prisoner’s sentence. See General Statutes § 18-98d (c); see also
Harris
v.
Commissioner of Correction,
supra,
The petitioner continuously draws our attention to the fact that, according to the respondent's improper calculation on April 24, 2003, of his anticipated release date, he discharged his sentences imposed in connection with dockets 1 and 2 not on April 25, 2003, but on October 8, 2004. Our decision in
Cox
is instructive. In that case, the petitioner’s anticipated discharge date of August 29,2003, resulted from the respondent’s miscalculation and improper transfer of credit. See
Cox
v.
Commissioner of Correction,
*821
supra,
The petitioner correctly notes that we previously have observed that “[t]he merger process [dictated by § 53a-38 (b)J does not alter the fact that concurrent sentences remain separate terms of imprisonment which the legislature has permitted to be served at one time.” (Internal quotation marks omitted.)
Harris
v.
Commissioner of Correction,
supra,
We have explained that ”[t]he fifth amendment to the United States constitution provides in relevant part: ‘No person shall ... be subject for the same offense to be twice put in jeopardy of life or limb . . . .’ The double jeopardy clause of the fifth amendment is made applicable to the states through the due process clause of the fourteenth amendment. . . . ‘Although the Connecticut constitution has no specific double jeopardy provision, we have held that the due process guarantees of [the Connecticut constitution] . . . include protection against double jeopardy. . . .
“ ‘We have recognized that the [d]ouble [¡Jeopardy [c]lause consists of several protections: It protects against a second prosecution for the same offense after acquittal. It protects against a second prosecution for the same offense after conviction. And it protects against multiple punishments for the same offense. . . . These protections stem from the underlying premise that a defendant should not be twice tried or punished for the same offense. ’ ” (Citation omitted.)
State
v.
Colon,
We note, as the petitioner does in his reply brief, that the respondent addressed a different claim than that articulated by the petitioner. The petitioner contends that the trial court unconstitutionally delegated its powers to the respondent whereas the respondent characterizes the claim as being that the respondent usurped the trial court’s authority.
The petitioner relies on a footnote in
Hammond
v.
Commissioner of Correction,
