delivered the Opinion of the Court.
1 1 In this appeal, we consider whether the results of a preliminary breath test ("PBT")
T2 In this case, the county court determined that although evidence that a PBT registered a positive result for the presence of alcohol is inadmissible to prove intoxication, that evidence cоuld nevertheless be admitted for impeachment purposes if the defendant testified that he had not been drinking. The district court affirmed this decision. We determine that the ruling is erroneous. While a police officer is authorized to conduct a PBT as part of the officer's investigation, we hold that based on the plain language of section 42-4-1801(6)(i)(III), the PBT results may not be used in any court action except as specifically provided in the statute itself. Thus, because the statute does not allow for using PBT results as impeachment evidence, we reverse the order of the district court and remand the case to that court with instructions to return the case to the county court for рroceedings consistent with this opinion.
I. Facts and Procedural History
13 Officer Morris stopped Petitioner, Peter Cain, for failing to use his turn signal and not fully stopping at a stop sign while driving his truck. When Officer Morris pulled Cain over, he detected an odor of alcohol and noticed that Cain's speech was slurred and his eyes were bloodshot and watery. Officer Morris also found an unоpened case of beer in the bed of the truck. Cain told Officer Morris that he was coming from a liquor store and that he had not been drinking earlier in the evening. At this point, Officer Morris called Officer Verver to the seene to assist him.
T4 Cain declined to perform a voluntary roadside sobriety test but did submit to a PBT at Officer Verver's request. The PBT returned a рositive result of 0.075 g/210L, thereby indicating the presence of alcohol. Based on the positive PBT result and his other observations, Officer Morris determined that he had probable cause to believe that Cain was operating his motor vehicle while intoxicated. As such, Officer Morris arrested Cain for DUI. After his arrest, Cain refused to take a breath or blood test to determine his blood aleohol content.
1 5 The People subsequently charged Cain with DUI, failure to signal, and failure to stop at a stop sign. Cain pled not guilty. Cain intended to testify at trial that he had not been drinking and that Officer Morris smelled alcohol because the first case of beer that he had picked up at the liquor stоre was leaking and spilled on his shirt. Cain also planned to testify so that the jury would see that his eyes are usually watery and would hear that his speech is slurred due to a hearing impediment.
T6 After the cross-examination of Officer Verver and prior to re-direct, the trial court took its noon recess. At this point, outside of the presence of the jury, the prosecutor informed the court that he wanted to present evidence that Officer Verver gave Cain a PBT that registered a positive result for the presence of alcohol. The prosecutor explained that he intended to use the evidence to rebut defense counsel's assertion in her opening statemеnt that Cain smelled of alcohol because he spilled beer on himself.
T7 Ultimately, following a Curtis advisement, Cain elected not to testify. See People v. Curtis,
{8 The jury found Cain guilty of DWAI and two traffic offenses. Cain appealed to the district court, where he argued that the county court erred when it concluded that the positive PBT result could be used as impeachment evidence if he testified. Cain assertеd that this ruling was contrary to Colorado law and also had a chilling effect on his right to testify, as guaranteed by both the United States and Colorado Constitutions. The district court affirmed the county court's decision. It concluded that PBT results are admissible for impeachment purposes.
T 9 Cain petitioned this Court for certiorari review, which we granted.
II. Standard of Review
{10 The interpretation of a statute raises a question of law that we review de novo. Hendricks v. People,
III Analysis
111 The Peoрle concede that PBT results are generally inadmissible; however, they argue that the results are nevertheless admissible for impeachment purposes where one party opens the door to the evidence. We disagree. To reach this decision, we first review the language of the statute. Then, we consider the People's argument that there is an exception to the statutory bar on the use of the PBT results as evidence at trial if the results are introduced for impeachment purposes, and we find the argument unconvine-ing. Finally, we evaluate the effect of the county court's decision on Cain's right to testify at trial and determine that a new trial is warranted.
A. Section 424-1301(6)(i)(IID)
112 Seсtion 42-4-1801 permits police officers to conduct preliminary tests using approved devices when investigating a person suspected of DUI or DWAIL. See § 42-4-1301(6)0)(I) to (IT). Section 42-4-1301(6)(i)(III), however, limits the use of the test results in court proceedings. Specifically, the statute precludes a court from admitting into evidence the results of a PBT except whеn the evidence is used in a probable cause hearing outside of the presence of the jury:
Neither the results of such preliminary screening test nor the fact that the person refused such test shall be used in any court action except in a hearing outside of the presence of a jury, when such hearing is held to determine if a law enforcement officer had probable cause to believe that the driver committed a violation of this section.
Id. "Result," although not defined in the statute, means "something that [arises] as a consequence, effect, issue, or conclusion." Webster's Third New International Dictionary 1937 (2002). Therefore, in this context, we read "result" to mean anything that the PBT registers. In other words, we understand the term to encompass: a specific
113 Therefore, the question presently before us is when, if ever, such a result is admissible at trial. We conclude, based on the plain language of the statute, that evidence of a PBT result is only admissible when there is a hearing, held outside of the рresence of the jury, "to determine if a law enforcement officer had probable cause to believe that the driver committed [an alcohol related traffic offense]." § 42-4-18301(6)M(III). "Under the rule of interpretation expressio unius exclusio alterius, the inclusion of certain items implies the exclusion of others." Beeghly v. Mack,
B. There Is No Impeachment Exception
1 14 Despite the clear language of the statute, the People argue that PBT results should nevertheless be admissible for impeachment purposes to protect the truth-seeking function of a trial In support of their position, the People cite several cases where courts have held that when one party "opens the door" to otherwise inadmissible evidence, that evidence may be used for impeachment purposes. The People also cite cases from other jurisdictions where the courts have allowed PBT evidence to be admitted.
§$15 The People's argument is unpersuasive. While the opening-the-door exception may allow evidence previously found inadmissible to be admitted later, see, e.g., Golob v. People,
116 By contrast, this case involves a statute that expressly prohibits the admission of PBT results in a criminal trial to determine if the defendant is guilty. The statute specifically limits the use of PBT results to hearings conducted to determine if a police officer had probable cause to arrest the defendant on suspicion of DUI or DWAL. § 42-4-1801(6)00(II1T). This restriction is important because in a probable cause hearing, the issue is whether, at the time of the arrest, "the facts and cireumstances within the arresting officer's knоwledge are sufficient to warrant a person of reasonable caution to believe an offense has been or is being committed." People v. Rueda,
1 17 Given the language of the statute, the People's reliance on several cases from other jurisdictions where courts have held that PBT results may bе introduced as impeachment evidence is also unpersuasive. See City of Westland v. Okopski,
[18 Thus, we conclude that the language of Colorado's statute precludes the use of PBT results for impeachment purposes at trial, regardless of whether the defendant testifies that he or she had not been drinking.
C. Application and Remand
119 Now, we consider the effect of the county court's ruling on Cain's right to testify. The United States and Colorado Constitutions grant a criminal defendant the right to testify on his or her own behalf. See People v. Skufca,
120 In this case, the county court's ruling burdened Cain's right to testify, as he had to choose to either forgo his right to tеstify to prevent inadmissible evidence from being introduced against him or testify and
T21 Therefore, the next question is whether this error was harmless. See Evans,
IV. Conclusion
122 For the foregoing reasons, we hold that based on the plain language of section 42-4-1801(6)(i)(III), PBT results may not be used in any court action for any purpose except as specifically provided in the statute itself. Thus, we reverse the order of the district court and remand the case to that court with instructions to return the case to the county court for proceedings consistent with this opinion.
Notes
. Information about Cain's planned testimony is based on defense counsel's statеments made outside of the presence of the jury.
. During her narration of the events, defense counsel did not say that Cain had not been drinking. Defense counsel did, however, explain that beer had leaked on Cain's shirt.
. Specifically, we granted certiorari to consider: ''Whether section 42-4-1301(6)(i)(III), C.R.S. (2013), prohibits, for impeachment purposes, admission of Preliminary Breath Test evidence indicating the positive presence of alcohol."
