delivered the Opinion of the Court.
I. Introduction
In this case we consider whether a court may apply the doctrine of issue preclusion to bar a defendant’s right to trial on a criminal charge when the same factual issue was previously determined in the prosecution’s favor in a probation revocation hearing. Because probation revocation hearings are held for different purposes than criminal trials, use different procedures, and do not protect a defendant’s rights as required by the Federal and Colorado Constitutions for a criminal trial, we hold that issue preclusion does not apply for two reasons. First, a threshold requirement of issue preclusion was not met because the defendant did not have a full and fair opportunity to litigate the issue in the revocation hearing. Second, a determination of guilt or innocence in a probation revocation hearing would undermine the function of the criminal trial process. In other words, a finding in a probation revocation hearing that a new crime occurred does not operate to preclude the right of an accused to a trial on the newly charged crime. Hence, we reverse the judgment of the district court and remand this case to the district court with directions to return the case to the county court for trial.
II. Facts and Proceedings Below
Defendant Todd Byrd was placed on felony probation for crimes not connected to these proceedings. During his probationary term, he was charged with the crime of driving with a revoked license, which constituted both a violation of his probation and a new criminal act. Thereafter, the prosecution sought to revoke the defendant’s probation on the basis of this new criminal charge. The prosecution also charged him with driving under revocation pursuant to section 42-2 — 138(l)(a), 11 C.R.S. (2002). Before trial on the criminal charge occurred in county court, 1 the district court found that the de *53 fendant had violated the terms of his probation because he drove while his license was revoked. 2
After this hearing, the defendant, who waived his right to a jury trial, appeared before the county court ready for trial on the new criminal charge. The prosecution moved for an immediate finding of guilt under a “res judicata or claim preclusion theory.”
3
The prosecution argued that at the defendant’s probation revocation hearing, the district court entered a final judgment finding the defendant had driven while his license was revoked and therefore, the district court had already decided the issue to be litigated in the trial. The trial court, relying upon
O’Neill v. Simpson,
The defendant appealed to the district court, which affirmed the conviction. The district court reasoned that the issue in the probation revocation hearing and trial was the same, that the parties were the same, and that the district court had previously entered a final judgment on the merits at the revocation hearing and accordingly, the doctrine applied.
The defendant petitioned this court for certiorari pursuant to C.A.R. 52(a) and section 13-6-310(4), 5 C.R.S. (2002). We granted certiorari on the issue of “whether the district court violated the defendant’s constitutional rights when it estopped him from adjudicating the criminal charge against him and entered a judgment of guilty without a trial based upon the outcome of a probation revocation hearing.”
III. Analysis
1. Issue Preclusion
We begin by briefly discussing the principles of issue preclusion, or collateral estoppel.
4
This doctrine generally bars relit-igation of an issue that was actually determined in a prior action between the same parties.
See, e.g., Ashe v. Swenson,
Although courts in other jurisdictions have held that the government may not invoke issue preclusion in a criminal case against a defendant, 6 we have not decided this issue, and we do not reach that issue here.
We have, however, previously determined that this doctrine may be invoked by the accused in a criminal case. In
Williamsen v. People,
In addition to outlining the elements of the doctrine in
Williamsen,
we stated that the Restatement (Second) of Judgments (1980) includes exceptions to the general rule of issue preclusion, and in certain circumstances, even if the elements are satisfied, courts should not preclude the relitigation of an issue.
In
Williamsen,
we considered in part whether a defendant could use an acquittal resulting from a hearing on a traffic infraction to invoke issue preclusion and prevent the introduction of that infraction in a subsequent criminal trial. We concluded that the prosecution was not barred from introducing evidence of the infraction even though the defendant had previously been acquitted on that charge.
2. Probation revocation hearings are held for different purposes, governed by different procedures, and do not protect a defendant’s rights as does a criminal trial
Our precedent differentiates probation revocation hearings from criminal trials. While the prosecution must prove both a criminal violation of a probation condition and a criminal offense beyond a reasonable doubt,
7
the proceedings function differently. As we held in
People v. Ressin,
The purpose of a probation revocation hearing is to consider the conduct of the defendant after an adjudication of guilt and to assess the correctness of the original sentence.
People ex. rel. Gallagher v. District Court,
Parties in probation revocation proceedings present the probationer’s activities to the court consistent with relaxed rules of evidence.
Holdren v. People,
On the other hand, the primary purpose of a criminal trial is to determine the factual question of a defendant’s guilt or innocence based on a fair determination of the truth.
Gray v. District Court,
Because probation revocation hearings are less formal, and probation itself is
*56
only a conditional suspension of what would otherwise have been a harsher sentence, simplified procedures exist.
Gehl,
161 Colo, at 539,
In addition to the different purposes and procedures of a probation revocation hearing and a criminal trial, the rights extended to a probationer are significantly reduced when compared to the accused facing criminal charges. While a probationer enjoys minimum procedural due process rights at a revocation hearing, “he is not entitled to the full panoply of constitutional guarantees available to one who has not been convicted of a crime....”
People v. Wilkerson,
Because revocation hearings are more informal than trials, the rules of evidence in probation revocation hearings are relaxed.
Atencio,
186 Colo, at 79,
Finally, although Colorado courts have not yet ruled on several rights granted to the accused at trial but denied to defendants contesting revocation of probation, we note that this body of law supports the distinction that we have made in orn-ease law between trials and probation revocation hearings. Confessions by probationers in revocation hearings may be admissible, even if obtained in violation of Miranda rights. 10 While a probationer retains her Fifth Amendment privilege to refuse to answer incriminatory questions, the prosecution may call her as a witness at a revocation *57 hearing. 11 The Fifth Amendment permits a probationer to decline to answer specific questions at the revocation hearing, but this refusal to answer may be used against her to revoke probation. 12 See also 5 Wayne R. LaFave et al., Criminal Procedure § 26.10(c)(2d ed.1999).
The numerous distinctions between a probation revocation hearing and a criminal trial compel us to conclude that a probation revocation hearing is held for different purposes, is governed by different procedures, and does not protect the defendant’s rights as required by the Federal and Colorado Constitutions for a criminal trial.
3. Issue preclusion based upon a revocation of probation does not bar the right of the defendant to a trial
We are aided by decisions of other courts in our determination that issue preclusion does not apply to bar the defendant from having a criminal trial. Some courts have concluded that even if the threshold elements of issue preclusion have been satisfied, underlying policies prevent the doctrine’s application. 13 Other courts have determined that because of the differences between revocation hearings and criminal trials, a requirement of the doctrine has not been satisfied and issue preclusion does not apply. 14 We conclude that a threshold requirement was not satisfied, and an application of issue preclusion would contravene public policy that the doctrine was designed to foster.
In reaching this conclusion, we find persuasive the analysis of the Vermont Supreme Court, which addressed whether a criminal defendant could invoke issue preclusion based on a favorable ruling to bar a subsequent trial.
State v. Brunet,
Initially, we note that the first three elements outlined in Williamsen are met. The issue in the revocation hearing — whether the *58 defendant drove under revocation — is identical to the issue that would have been litigated at trial. Further, there was a final judgment by the district court on the merits, and the same parties were involved in both-proceedings. We focus our analysis, therefore, on the fourth requirement: that the party against whom issue preclusion is asserted must have a full and fair opportunity to litigate the issue in the prior proceeding.
In determining whether this element was met, we turn to our precedent in Wil-liamsen and reason that it applies here. Although a traffic infraction hearing and a probation revocation hearing are not identical, they are both less formal than a criminal trial. The Williamsen court addressed the procedural informalities of traffic infraction hearings and concluded that the parties did not have a full and fair opportunity to litigate the issue as they would have at a criminal trial. Because an application of issue preclusion to bar the relitigation of the issue at trial would frustrate the purposes of a traffic hearing, the doctrine did not apply. Though not explicitly, Williamsen implicitly incorporated the exception to issue preclusion that “a new determination of the issue is warranted by differences in the quality or extensiveness of the procedures followed in the two courts” into the fourth requirement of issue preclusion. Williamsen stands in part for the proposition that when two proceedings are procedurally different, a party seeking to invoke issue preclusion does not satisfy the requirement that there was a full and fair opportunity to litigate the issue in the prior proceeding. Thus, we conclude that Byrd did not have the full and fair opportunity to litigate the issue of whether he was driving under revocation at the probation revocation hearing.
Our conclusion that the prosecution failed to satisfy the fourth requirement of issue preclusion is buttressed by the public policies which support the application of the doctrine.
17
We find persuasive the statement of the California Supreme Court that “[p]re-emption of trial of a new charge by a revocation decision designed to perform a wholly independent social and legal task would undermine the function of the criminal trial process as the intended forum for ultimate determinations as to guilt or innocence of newly alleged crimes.”
Lucido v. Superior Court,
*59
Issue preclusion fosters judicial economy. Although an application of issue preclusion in this context would reduce the number of court proceedings, judicial economy must yield in favor of preserving the criminal trial process as the exclusive forum in which to decide guilt or innocence for new crimes.
Lucido,
Finally, issue preclusion protects parties from vexatious litigation, which means harassment by frivolous, groundless, or bad faith litigation.
Lucido,
IY. Conclusion
For the reasons stated, we reverse the judgment of the district court and remand this case to the district court to return the case to county court for trial.
Notes
. On other occasions, we have stated that it is better practice to continue a probation revocation hearing until after a trial on a new charge. However, this timing decision lies within the discretion of the trial court.
People v. Ray,
. Although the district court did not specifically articulate the prosecution’s burden of proof beyond a reasonable doubt as required by section 16-11-206(3), 6 C.R.S. (2002), we have held that • in a revocation proceeding the court is entitled to a presumption that it applied the correct burden of proof.
People v. Carr,
. We prefer to use the terms “claim preclusion” and "issue preclusion” rather than "res judicata” and "collateral estoppel.” As we noted in
Farmers High Line Canal & Reservoir Co. v. City of Golden,
. This case concerns issue preclusion, not claim preclusion. Claim preclusion bars a subsequent action when parties or parties in privity have previously litigated the claim to a valid, final judgment.
Cromwell v. County of Sac,
.In addition to the application of the doctrine by the courts in criminal cases, the General Assembly has codified aspects of issue preclusion in the criminal code in sections 18-1-301 to - 303, 6 C.R.S. (2002), mandating that a second trial is barred for the same offense or if there has been a prior determination of an ultimate fact, and extending the double jeopardy prohibition to situations where the dual sovereignty doctrine otherwise would permit state prosecution after a separate sovereign has prosecuted the defendant for the same offense.
.
Cf. United States v. Dixon,
.
See
§ 16-11-206(3), 6 C.R.S. (2002);
People v. Carr.
.These elements do not directly correspond to those set forth in
Atencio
and
Allen
because both of those cases addressed due process requirements for both probation and parole revocation hearings. Unlike a parole hearing, a court rather than a " 'neutral and detached hearing body,’ members of which need not be judicial officers or lawyers” must determine whether to revoke or modify a term of probation.
Allen,
.
See also People v. Kelly,
.
See, e.g., State v. Mason,
.
United States v. Ross,
.
United States v. Robinson,
.
See, e.g., State v. McDowell,
.
See, e.g., United States v. Miller,
. Brunet and several other courts cited here concluded that an application of issue preclusion was improper in part because prosecutors are held to a lower standard of proof to establish a violation of probation. In Colorado, prosecutors are held to the same standard of proof, beyond a reasonable doubt, in probation revocation hearings and criminal trials unless the probationer has been convicted thereof in a criminal proceeding. § 16-11-206(3). We acknowledge this difference between other cases and the one before us, but still find the reasoning of other courts persuasive.
. For a similar analysis,
see also State v. Terry,
. Several courts have concluded that an application of issue preclusion to bar a criminal trial based on a decision at an earlier probation revocation hearing would "undermine the interests of justice, and erode public confidence in the criminal justice system.”
Brunet,
