Opinion
The so-called Three Strikes law prescribes increased punishment for a person who is convicted of a felony after sustaining one or more qualifying prior felony convictions or juvenile adjudications, which are commonly known as strikes. (Pen. Code, §§ 667, subds. (b)-(i), 1170.12.) The issue here is whether retrial of a strike allegation is permissible where a trier of fact finds the allegation to be true, but an appellate court reverses that finding for insufficient evidence. Defendant Antonio J. Barragan argues that retrial is barred by the constitutional requirement of fundamental fairness, equitable principles of res judicata and law of the case, and relevant statutory provisions. We conclude that retrial is permissible. We reverse the Court of Appeal’s judgment insofar as it bars retrial of a strike allegation.
Facts
An information charged defendant with several crimes, including being a felon in possession of a firearm, and alleged that he had one prior strike: a juvenile adjudication on June 8, 1995, for assault with a deadly weapon and with personal infliction of great bodily injury. To prove the alleged prior juvenile adjudication, the prosecution introduced into evidence copies of the juvenile court petition alleging the assault, and a minute order showing the juvenile court’s finding that defendant committed the assault. While testifying at trial, defendant admitted that he had sustained a “true finding” in juvenile court in 1995 for striking someone with a baseball bat. During closing argument, defendant’s counsel stated: “[Defendant] has been very candid . . . about [his] priors. You’ve heard about them. There’s not an issue. . . . [Defendant] has been very candid . . . about his testimony and his prior convictions as an adult and the true finding as a juvenile.” The trial court instructed the jury that if it found defendant guilty, then it had to “determine whether the allegation of the prior ‘serious felony’ conviction is true.” The court also instructed the jury that “as a matter of law,” assault with a deadly weapon and with infliction of great bodily injury “is a ‘serious felony’ *240 offense” under the Three Strikes law, and that “a ‘conviction’ occurs by a ‘true finding’ in Juvenile Court after trial, or upon an admission by the accused without trial.” The jury found defendant guilty of being a felon in possession of a firearm, found him not guilty of the remaining charges, and found true “the allegation that [he] . . . suffered a true finding of a serious felony offense in Juvenile Court, within the meaning of [the Three Strikes law], to wit: on or about June 8, 1995, . . . defendant was convicted of Assault with a Deadly Weapon With Personal Infliction of Great Bodily Injury . . . .” The trial court imposed a four-year prison term, which it calculated by taking the two-year middle term ordinarily applicable to a “felon in possession” conviction and doubling it under the Three Strikes law for defendant’s prior strike.
The Court of Appeal affirmed defendant’s conviction, but found insufficient evidence to support the jury’s true finding on the strike allegation. Regarding the latter issue, the court first reasoned that in order to prove the strike allegation, the prosecution had to prove that defendant’s prior juvenile court adjudication “resulted in a declaration of wardship.” The court then found that the prosecution failed to meet this burden, explaining: “The prosecution did no more than prove that true findings were made on the petition and the matter was set for a dispositional hearing. While it is possible to speculate that the true finding on the petition resulted in a declaration of wardship, we conclude on this record it is not possible to so infer. The evidence supporting the finding of a strike based on [defendant’s] prior juvenile adjudication was insufficient.” Turning to remedy, the court noted a split of authority regarding whether retrial of a strike allegation is permissible after a reversal for insufficient evidence. “[S]tand[ing] by” its prior decision in
People
v.
Mitchell
(2000)
Defendant filed a petition for review, challenging the affirmance of his conviction. The People also filed a petition for review, challenging only the Court of Appeal’s conclusion that retrial of the strike allegation is impermissible. We granted the People’s petition and denied defendant’s. 1
Discussion
As the Court of Appeal noted, California appellate courts have disagreed on whether retrial of a strike allegation is proper after an appellate court reverses a true finding for insufficient evidence.
Mitchell,
which was decided by the same appellate court that decided the case now before us, held that
*241
retrial is impermissible “where the government has had a full and fair opportunity to present its case unhampered by evidentiary error or other impediment . . . .”
(Mitchell, supra,
In resolving this conflict, we begin with a related principle that the United States Supreme Court has recently established: in the noncapital sentencing context, retrial of a prior conviction allegation does not violate the double jeopardy clause of the federal Constitution.
(Monge
v.
California
(1998)
The high court’s decision in
Monge II
reviewed and affirmed our decision in
People
v.
Monge
(1997)
Foreshadowing defendant’s contentions here, the lead opinion in
Monge I
noted that the inapplicability of double jeopardy protections “raises numerous secondary issues. For example, [a] Court of Appeal’s determination that the evidence [at trial] was insufficient to prove [a] defendant’s prior conviction was of a serious felony is, at the very least, the law of th[e] case. Thus, the prosecution would have to present additional evidence at a retrial of the prior conviction allegation in order to obtain a different result. What limitations might apply to this additional evidence ... we do not decide, because the Court of Appeal did not address that issue. For the same reason, we express no opinion about whether [Penal Code] section 1025[
2
] (or some other applicable provision) might in some cases bar retrial of the prior conviction allegation as a statutory matter irrespective of constitutional constraints. Finally, we express no opinion about whether due process protections preclude the prosecution from retrying the prior conviction allegation.”
(Monge I, supra,
Before addressing defendant’s contentions, we also note that 50 years ago, in
People v. Morton
(1953)
Although cognizant of
Morton's
holding, we agree with defendant that
Morton
is not dispositive. Defendant correctly notes that
Morton
“did not address whether retrial of the prior conviction was barred by the doctrines of collateral estoppel, res judicata, law of the case, or fundamental fairness.” Nor did any of the cases
Morton
discussed. “[C]ases are not authority for propositions not considered. [Citations.]”
(People
v.
Alvarez
(2002)
I. FUNDAMENTAL FAIRNESS
Defendant argues that “[t]he doctrine of fundamental fairness, as incorporated in the due process clause of the federal and state Constitutions, suggests that it is unfair to give the prosecution a second opportunity to prove an allegation [where] it failed to carry its burden of proof during the first trial.” He asserts that a state may not regulate its own judicial procedures in a manner that “ ‘offends some principle of justice so rooted in the traditions and conscience of our people as to be ranked as fundamental.’ [Citations.]” He also asserts that “[t]he due process clause may be invoked ‘to insure that [a] state created right is not arbitrarily abrogated.’ [Citation.]” According to defendant, California accords him a “statutory right to a trial on the truth of’ his alleged prior conviction, and allowing a “retrial of the truth of that allegation after an appellate court reversal for insufficient evidence would *244 abrogate [his] right to be discharged from the penalties associated with a not true finding to that allegation.”
In considering defendant’s due process argument, we find instructive the high court’s rejection of a similar argument in
Dowling
v.
United States
(1990)
We reject defendant’s due process argument because it essentially asks us to do what the high court in
Dowling
said we could not do: “use the Due Process Clause as a device for extending the double jeopardy protection to cases where it otherwise would not extend.”
(Dowling, supra,
Our rejection of defendant’s due process argument is also consistent with the high court’s decision in
Caspari
v.
Bohlen
(1994)
The high court’s discussion in Caspari mirrors our earlier discussion in Morton. As previously noted, there, in holding that retrial is “proper” where “the defects in the proof of the prior convictions [are] capable of correction on a retrial,” we explained: “This procedure . . . carries out the policy of the statutes imposing ‘more severe punishment, proportionate to their persistence in crime, of those who have proved immune to lesser punishment’ [citation], and prevents defendants from escaping the penalties imposed by those statutes through technical defects in . . . proof. It affords the defendant a fair hearing on the charge, and if it cannot be proved he will not have to suffer the more severe punishment.” (Morton, supra, 41 Cal.2d at pp. 544-545.) In light of Dowling, Caspari, and Morton, we reject defendant’s due process argument.
II. THE LAW OF THE CASE
As previously noted, in
Monge I,
after concluding that double jeopardy protections did not bar retrial of a prior conviction allegation, the lead opinion noted: “Of course, this conclusion raises numerous secondary issues. For example, the Court of Appeal’s determination that the evidence [at trial]
*246
was insufficient to prove [the] defendant’s prior conviction was of a serious felony is, at the very least, the law of this case. Thus, the prosecution would have to present additional evidence at a retrial of the prior conviction allegation in order to obtain a different result.”
(Monge I, supra,
Under the law of the case doctrine, when an appellate court “ ‘states in its opinion a principle or rule of law necessary to the decision, that principle or rule becomes the law of the case and must be adhered to throughout [the case’s] subsequent progress, both in the lower court and upon subsequent appeal ....’”
(Kowis v. Howard
(1992)
As here relevant, the law of the case doctrine is subject to an important limitation: it “applie[s] only to
the principles of law
laid down by the court as applicable to a retrial of fact,” and “does not embrace the facts themselves ____”
(Moore v. Trott
(1912)
Our decisions make clear that, contrary to defendant’s assertion, nothing in the law of the case doctrine itself limits the additional evidence that a party may introduce on retrial to that which “could not have been presented at the first trial through the exercise of due diligence.” Perhaps the most relevant case in this regard is
Mattson.
During a prior appeal in that matter, we reversed the defendant’s convictions after concluding from “the record of the first trial” that police had illegally obtained his confessions and that the trial court had erred in' denying his suppression motion.
(Mattson, supra,
In affirming the trial court’s ruling in Mattson, we first found the defendant’s attempt to limit the evidence on retrial to be contrary to statute. We explained: “A reversal of a judgment without directions is an order for a new trial. (§ 1262.) ‘An unqualified reversal remands the cause for new trial and places the parties in the trial court in the same position as if the cause had never been tried.’ [Citation.] ‘The granting of a new trial places the parties in the same position as if no trial had been had. ...’(§ 1180.) [][] That status even permits amendment of the accusatory pleading [citation], as well as renewal and reconsideration of pretrial motions and objections to the admission of evidence. [Citation.] Absent a statutory provision precluding relitigation, a stipulation by the parties, or an order by the court that prior rulings made in the prior trial will be binding at the new trial, objections must be made to the admission of evidence (Evid. Code, § 353), and the court must consider the admissibility of that evidence at the time it is offered. [Citations.]” (Mat tson, supra, 50 Cal.3d at pp. 849-850, fn. omitted.)
*248
In
Mattson,
we next rejected the defendant’s reliance on the law of the case doctrine, explaining: “The law-of-the-case doctrine binds the trial court as to the law but controls the outcome
only if the evidence on retrial or rehearing of an issue is substantially the same as that upon which the appellate ruling was based.
[Citations.] The law-of-the-case doctrine applied to this court’s prior ruling only insofar as we held that California law governed the admissibility of the confessions. The trial court did not depart from that ruling in its determination,
based on new evidence,
that the confessions were admissible.”
(Mattson, supra,
In this regard,
Mattson
is consistent with a long line of California decisions. For example, in
Chandler v. People’s Sav. Bank
(1884)
In arguing for a “due diligence” standard, defendant relies on statutes governing motions for new trial, for reconsideration, and for relief from default. He notes that under section 1181, subdivision 8, a criminal defendant cannot obtain a new trial based on “new evidence” without showing that “he could not, with reasonable diligence, have discovered and produced” the evidence “at trial.” He notes that a civil litigant relying on new evidence must make a similar showing to obtain either a new trial under Code of Civil Procedure section 657, subdivision 4, or reconsideration under Code of Civil Procedure section 1008, as the latter provision has been judicially construed. (See
Blue Mountain Development Co. v. Carville
(1982)
We reject defendant’s argument as being inconsistent with the separate scheme that has long governed retrials after appellate reversals for insufficient evidence.
4
As previously noted, section 1262 provides that a reversal of a judgment against the defendant “shall be deemed an order for a new trial, unless the appellate court shall otherwise direct.” As we explained over 80 years ago, an appellate court’s power to direct otherwise—i.e., to direct a trial court to enter judgment on an issue in the appellant’s favor—“should be exercised only when, upon a full consideration of the record, the party against whom the judgment is [to be] entered in the trial court could not successfully meet the contentions of his adversary upon a retrial or reconsideration of the
*250
case in the trial court.”
(Tupman v. Haberkern
(1929)
These well-established principles were at work in Mattson. As previously discussed, we held in Mattson that, after our reversal for insufficient evidence at trial to establish the admissibility of the defendant’s confession, sections 1180 and 1262 authorized the prosecution at retrial to relitigate this issue using evidence it failed to present at the first trial, and the law of the case doctrine did not require exclusion because the prosecution had, in fact, introduced additional evidence at retrial. (Mattson, supra, 50 Cal.3d at pp. 849-853.) As we have shown, Mattson is consistent with a long line of cases applying the law of the case doctrine after reversals for insufficient evidence, none of which imposed or even mentioned a “due diligence” limitation on the introduction of new evidence at retrial. We therefore reject defendant’s argument.
In arguing for a “due diligence” requirement, defendant also relies on
Mitchell.
There, the court held that because “the government ha[d] had a full and fair opportunity to present its case unhampered by evidentiary error or other impediment, fundamental fairness require[d] application of equitable principles of res judicata (direct estoppel) and law of the case to preclude relitigation” of an alleged prior conviction after the court’s prior reversal of an earlier true finding for insuficient evidence.
(Mitchell, supra,
We conclude that
Mitchell
erred in applying the law of the case doctrine based on the prosecution’s failure to show “due diligence.” In imposing this requirement,
Mitchell
failed to cite or discuss the statutes and cases that authorize introduction of new evidence, without limitation, on retrial after an appellate reversal for insufficient evidence. Instead,
Mitchell
*251
cited the lead opinion in
Monge I
and two civil decisions from the First District Court of Appeal,
Bank of America
v.
Superior Court
(1990)
Bank of America
also does not support
Mitchell’s
“due diligence” gloss on the law of the case doctrine. There, the court held that where a motion for judgment notwithstanding the verdict (JNOV) is “made and denied by the trial court, and the appellate court reverses the judgment for insufficiency of the evidence,” retrial is improper even where the reversal is “unqualified.”
(Bank of America, supra, 220
Cal.App.3d at p. 626.) In reaching this conclusion, the court specifically relied on Code of Civil Procedure section 629, which
mandates
entry of judgment in a civil case, rather than a new trial, when an appellate court finds that the trial court erred in denying a JNOV motion.
(Bank of America, supra, 220
Cal.App.3d at pp. 624—626.)
Bank of America
is inapposite because Code of Civil Procedure section 629 is inapplicable to a criminal sentencing proceeding, and neither
Mitchell
nor defendant here identifies a similar statute that governs retrial of the prior juvenile adjudication allegation at issue in this criminal case. Moreover,
Mitchell
incorrectly reasoned that “[i]n granting the relief requested, the court in
Bank of America”
relied in part on the “law of the case.”
(Mitchell, supra,
McCoy,
the other First District decision
Mitchell
cited, is factually similar to
Bank of America
and is similarly inapposite. In
McCoy,
the defendants, whose JNOV motion had been denied, moved for entry of judgment in the trial court on remand after our “unqualified reversal” of judgments against the defendants “for insufficiency of the evidence.”
(McCoy, supra,
227 Cal.App.2d at pp. 1658-1659.) The trial court granted the motion and entered judgments for the defendants.
(Id.
at pp. 1658-1659.) The Court of Appeal affirmed the judgments for the defendants, following
Bank of America
and holding that, where JNOV motions are improperly denied, Code of Civil Procedure section 629 modifies the general rule that an unqualified reversal for insufficient evidence remands the case for a new trial.
(McCoy, supra,
For all of the reasons discussed above, we reject defendant’s argument that “retrial should be barred under the doctrine of the law of the case unless the prosecution can establish that it has discovered new evidence which could not have been presented at the first trial through the exercise of due diligence.”
m. RES JUDICATA/COLLATERAL ESTOPPEL
As generally understood, “[t]he doctrine of
res judicata
gives certain
conclusive effect
to a
former judgment
in subsequent litigation involving the same controversy.” (7 Witkin, Cal. Procedure (4th ed. 1997) Judgment, § 280, p. 820.) The doctrine “has a double aspect.”
(Todhunter v. Smith
(1934)
Defendant’s claim raises a threshold issue that we have not yet decided: whether either aspect of the res judicata doctrine “even applies to further proceedings in the same litigation. [Citation.]”
(People
v.
Memro
(1995)
Similarly, in this case, we need not resolve this threshold question because defendant’s res judicata claim fails for other reasons. Initially, we agree with the People that neither aspect of res judicata applies because an appellate reversal, for insufficient evidence, of a true finding regarding an alleged prior conviction or juvenile adjudication does not generally constitute a final decision on the merits regarding the truth of the alleged prior
*254
conviction or juvenile adjudication.
5
As previously discussed, where an appellate court finds that the evidence at trial was insufficient to support the verdict, the “normal rule” is that the losing party on appeal is “entitled to a retrial” unless the record shows “ ‘that on no theory grounded in reason and justice could the party defeated on appeal make a further substantial showing in the trial court in support of his cause.’ [Citations.]”
(Boyle, supra,
71 Cal.2d at pp. 232-233, fn. 3.) Here, nothing in the record suggests that, at a retrial, the People would be unable to make the necessary showing regarding the declaration of wardship, and defendant has never contended otherwise.
6
Monge I
and
Monge II
established that such retrials are not precluded by double jeopardy principles, and we found earlier in this opinion that such retrials are not precluded by due process principles or the law of the case doctrine. Thus, “the Court of Appeal should not have departed from the normal rule that [the People were] entitled to a retrial” on defendant’s alleged prior juvenile adjudication.
(Boyle, supra,
Our conclusion is fully consistent with the high court’s decision in
Monge II.
As previously explained, there the high court held that where an appellate court finds insufficient evidence to support a true finding regarding an alleged prior conviction, the order reversing the finding lacks the “ ‘constitutional finality’ ” to trigger double jeopardy protections and, therefore, does not preclude retrial.
(Monge II, supra,
The conclusion that res judicata does not apply here is also consistent with our prior decision in
Mattson.
As previously explained,
Mattson
held that after an appellate court reverses a conviction because the evidence at trial was insufficient to establish the admissibility of confessions, the prosecution on remand may “relitigate” that issue and “introduce[] evidence [that] had not been presented at the first trial. . . .”
(Mattson, supra,
*256
Moreover, we find that even if defendant could satisfy the technical, threshold requirements of the res judicata doctrine, application of the doctrine would be inappropriate here. Whether res judicata applies in a given context is not simply a matter of satisfying the doctrine’s technical requirements. As we have explained, “ ‘the rule of collateral estoppel in criminal cases is not to be applied with the hypertechnical and archaic approach of a nineteenth century pleading book, but with realism and rationality.’ [Citations.] Accordingly, the public policies underlying collateral estoppel—preservation of the integrity of the judicial system, promotion of judicial economy, and protection of litigants from harassment by vexatious litigation—strongly influence whether its application in a particular circumstance would be fair to the parties and constitutes sound judicial policy. [Citation.]”
(Lucido
v.
Superior Court
(1990)
Looking at the relevant policy considerations, we conclude that application of the res judicata doctrine is inappropriate here, even if defendant could otherwise satisfy the doctrine’s technical requirements. Regarding the integrity of the criminal justice system, declining to apply res judicata principles after appellate reversal of a fact finder’s true finding on a prior conviction allegation does not create a risk of “inconsistent verdicts.”
(Lucido, supra,
We disagree with defendant that application of res judicata principles is necessary to “prevent [him] from being harassed by multiple trials on the same allegation.” Although defendant’s approach “would eliminate repetitive litigation,” “[t]he essence of vexatiousness ... is not mere repetition. Rather, it is harassment through baseless or unjustified litigation. [Citation.] [Defendant] does not assert that the criminal proceedings in this case are intended to harass.”
(Lucido, supra,
Finally, considerations of judicial economy do not justify application of res judicata principles in this context. Because most failures of proof like the one at issue here are inadvertent, rather than strategic or otherwise intentional, the number of retrials our conclusion permits would, no doubt, be fairly small. Moreover, a trial of a prior conviction allegation “is simple and straightforward,” and “[o]ften . . . involves only the presentation of a certified copy of the prior conviction along with the defendant’s photograph and fingerprints. In many cases, defendants offer no evidence at all, and the outcome is relatively predictable.”
(Monge I, supra,
IV. LEGISLATIVE INTENT
Defendant argues that retrial of the prior juvenile adjudication allegation “should be barred because the statutes which grant[ed] [him] a right to an adversarial hearing on the truth of [the] allegation suggest that the Legislature did not want the prosecution to have a remedy from a not true finding.” In support of his argument, he cites statutes requiring the prosecution to plead and prove each prior conviction that qualifies as a strike, and requiring the jury (or the court if a jury is waived) to try the alleged prior conviction and make a finding on the allegation. (§§ 667, subd. (f)(1), 1025, subd. (b), 1158.) He also asserts that no statute authorizes the People to “appeal. . . from a not true finding to a prior conviction allegation” or “to seek a second trial” on such an allegation “based on the discovery of new evidence.” This statutory framework, defendant contends, “suggests that the prosecution should not be allowed to proceed with a second trial on” a prior conviction allegation after an appellate reversal of a true finding “for insufficient evidence.” “If the trier of fact had properly performed [its] duty, a not true finding would have been entered at the first trial and the matter would have concluded at that time. [A] defendant should not be worse off because he was required to appeal to obtain an accurate result.” Moreover, permitting a retrial after an appellate reversal for insufficient evidence “would, in effect, provide the prosecution with a remedy that has been denied it by the Legislature.”
(5) For several reasons, we find defendant’s legislative intent argument unpersuasive. First, the issue of whether the People have a statutory right to appeal a not true finding on a prior conviction allegation is unsettled and is currently pending before this court. {People v. Samples, review granted Feb. 25, 2003, S112201.) Thus, defendant’s argument depends on an assumption that may prove incorrect. Second, we find nothing in the pleading and proof requirement of the cited statutes that suggests a legislative intent to preclude retrial after an appellate court reverses, for insufficient evidence, a fact finder’s true finding on a prior conviction allegation. 8 Third, were we to construe the cited
*259
statutes to preclude retrial, “we might create disincentives” that would cause the Legislature to “diminish the[] important procedural protections” it has statutorily provided as “a matter of legislative grace, not constitutional command.”
(Monge II, supra,
V. CONCLUSION
The Court of Appeal erred in concluding that the People may not retry defendant’s alleged prior juvenile adjudication. We reverse the judgment of the Court of Appeal insofar as it prohibits retrial of the alleged prior juvenile adjudication. We otherwise affirm the Court of Appeal’s judgment.
George, C. J., Kennard, J., Baxter, J., Werdegar, J., Brown, J., and Moreno, J., concurred.
Notes
In neither their petition nor their briefs have the People challenged the Court of Appeal’s conclusion that the evidence at trial was insufficient to establish a strike based on defendant’s alleged prior juvenile adjudication. We express no opinion on that question.
Unless otherwise indicated, all further statutory references are to the Penal Code.
Given its conclusion, the high court did not consider the merits of the lower court’s rule.
(Caspari, supra,
We also note that a criminal defendant’s ability to obtain a new trial based on new evidence is not as limited as defendant suggests. (See
People v. Hayes
(1990)
In their reply brief in this court, the People also argue that collateral estoppel does not apply for the additional reason that “[t]he factual issue to be litigated in a retrial of the strike—whether the required juvenile wardship declaration exists—was never litigated or determined in a former proceeding,” inasmuch as defendant did not contest the issue at trial. Because the People did not raise this argument in either the Court of Appeal or their opening brief in this court, we decline to address it. (See
Varjabedian
v.
City of Madera
(1977)
As previously noted, defendant admitted at trial that he had sustained a “true finding” in juvenile court in 1995 for striking someone with a baseball bat, and his counsel told the jury during closing argument that “ffihere’s not an issue” regarding defendant’s “priors.” Moreover, the probation department’s sentencing report in this case states that defendant was committed to a juvenile ranch facility as a result of the true finding in the 1995 juvenile court proceeding.
The cases defendant cites do not require a different conclusion. They address the estoppel effect of
a jury’s final
verdict
acquitting
a defendant of one count in a multicount complaint, during retrial on a
separate
count in the complaint after a mistrial or appellate reversal as to that
separate
count.
(U.S. v. Romeo
(9th Cir. 1997)
Although citing section 1025, subdivision (b), in support of his “pleading and proof’ argument, defendant does not contend that this statute directly bars retrial by providing that a prior conviction allegation “shall be tried by the jury that tries the issue upon the plea of not guilty . . . .” (See
People
v.
Moore
(1992)
Defendant’s arguments mirror the reasoning the court in
Mitchell
set forth in holding that the doctrines of res judicata and law of the case bar retrial of an alleged prior conviction after an appellate court reverses a true finding for insufficient evidence. Like defendant, the court in
Mitchell
assumed that “the People do not have the right to appeal”
(Mitchell, supra,
