N. PATRICK CROOKS, J.
¶ 1. This is a double-murder case that centers on the evidence presented on the question of the defendant's mental responsibility. [664]*664The circuit court1 found the defendant responsible. The court of appeals, in a split decision,2 granted the defendant a new trial under its discretionary authority to reverse convictions in cases where "it appears from the record that... it is probable that justice has for any reason miscarried[.]"3 We now reverse the grant of a new trial because we conclude that the court of appeals erroneously exercised its discretion, and we remand to the court of appeals for the resolution of the remainder of the claims raised on appeal.
¶ 2. Corey Kucharski was charged with two counts of intentional homicide for the murders of his parents, which he later said he committed in obedience to voices he heard. He pleaded not guilty by reason of mental disease or defect (an NGI plea). He pleaded no contest to the guilt phase of the trial, and waived a jury trial on the responsibility phase.4
[665]*665¶ 3. During the trial, one doctor, Dr. Rawski, testified as the sole witness for the defense; his and other doctors' reports and materials were entered into evidence. Dr. Rawski testified that it was his opinion to a reasonable degree of medical certainty that Kucharski's symptoms of schizophrenia were so severe on the night he killed his parents that he lacked substantial capacity to appreciate the wrongfulness of his conduct or conform his conduct to the law. A second doctor who examined him for the defense, Dr. Pankiewicz, was also of the opinion that at the time of the crime, Kucharski was not mentally responsible. A third expert who examined Kucharski at the State's request, Dr. Jurek, did not come to any different conclusion. At trial, the State presented no witnesses; it did not dispute that Kucharski was mentally ill but argued that undisputed evidence of Kucharski's actions [666]*666showed that he did have substantial capacity to appreciate the wrongfulness of what he did and to conform his conduct to the law.
¶ 4. The circuit court agreed with the State, citing evidence such as Kucharski's statements about expecting punishment for the crime and his decision not to commit suicide or engage in a shootout with police despite reporting that he had heard voices telling him to do so. In light of that evidence, the circuit court found that Kucharski had not met his burden on the issue of responsibility.5 He was convicted and sentenced to consecutive life sentences.
¶ 5. Though Kucharski raised several claims on appeal, the court of appeals' analysis focused solely on granting his motion for a new trial under Wis. Stat. § 752.35, the discretionary reversal statute. For purposes of interpreting that statute, justice has miscarried if "there is a substantial probability that a new trial would produce a different result."6 We have held that "only in exceptional cases" is it appropriate for a reviewing court to exercise its discretion to grant a new trial in the interest of justice.7
¶ 6. The court of appeals held that there was a substantial probability of a different outcome at a new [667]*667trial "because [Kucharski] met his burden"8 of proving by the greater weight of the credible evidence that he was not mentally responsible for the murders. It found that the evidence in his favor "certainly comprised 'the greater weight of the credible evidence.' "9 The dissent would have affirmed the circuit court, citing the well-established proposition that "the credibility of witnesses, the weight of the evidence and the determination of whether the defendant has met his burden" are questions that "are the province of the trial court alone."10
¶ 7. The State argues that the trial court appropriately weighed the evidence in a way that is consistent with prior case law such as State v. Sarinske,11 which holds that a trier of fact is not required to accept the opinion of an expert, even if uncontradicted. The State argues that the court of appeals "wholly ignore [d] this requirement and instead substitute [d] its judgment for that of the fact-finder . . . ."12 Kucharski argues that "[t]he very nature of the test for miscarriage of justice necessitates substitution of the appellate court's judgment for that of the factfinder" and [668]*668that in fact an appellate court should have "unfettered discretion to review the record without deference to the factfinder's conclusions."
¶ 8. We uphold discretionary rulings unless they are reached under an incorrect view of the facts or the law. In State v. D'Acquisto13 we stated,
The appropriate standard of review for assessing the propriety of the court of appeals' [discretionary ruling] is that this court will uphold the court's discretion if its decision is made on appropriate facts and the correct law and thus is one which a court reasonably could have reached. If it is demonstrated that the court of appeals made a discretionary order,.. . based upon a mistaken view of the law, we will ordinarily reverse that order.
In this case, that is what happened.14 The reason given by the court of appeals in this case for invoking the rarely used power of discretionary reversal was that the defendant had "met his burden," which is going too far for a reviewing court on a question of fact. Further, the sole reason given for the discretionary reversal was that improperly reached conclusion. The framework for reviewing evidentiary challenges must recognize "established rules of jurisprudence designed to protect the sanctity of findings of fact... ,"15 It is thus error [669]*669for a reviewing court to set aside findings of fact without evaluating them under the proper standard of review.
¶ 9. The proper standard of review for appellate review of whether a party has met his burden on the matter of mental responsibility is uncontroversial and well established in both Wisconsin law and federal law: whether a person has met his or her burden on the question of mental responsibility is a question of fact, subject to a clearly erroneous standard of review.16
[670]*670¶ 10. The court of appeals' holding reveals its error: it simply performs a new weighing of the evidence and then states outright that Kucharski "met his burden" and that the evidence "certainly comprised" the required burden of proof — determinations that are unquestionably issues of fact, not law. By way of illustration, in State v. Hintz,17 a case that considered a sufficiency of the evidence challenge and discretionary reversal, we acknowledged, as we remanded for a new trial, that the ultimate question of whether the evidentiary burden was met would be one for the trier of fact and not for the reviewing court: Noting that "it is the function of the [trier of fact] to resolve this doubt," we remanded so that "the question of defendant's guilt should be passed upon by another jury____"18
¶ 11. Applying the proper standard of review and not disturbing the factual findings of the circuit court concerning the burden of proof because they are not clearly erroneous, we conclude that the court of appeals erroneously exercised its discretion. In this case the only reason given by the court of appeals for the new trial in the interest of justice was that court's improper de novo weighing of the evidence. When the evidence is reviewed under the proper standard, there [671]*671is not a probability of a different result on retrial such that a new trial in the interest of justice is warranted.
¶ 12. We therefore reverse the grant of a new trial under Wis. Stat. § 752.35 and remand to the court of appeals for the resolution of Kucharski's remaining unaddressed claims.19
I. BACKGROUND
1 13. Kucharski called 911 after midnight on a February night in 2010 to request a coroner. He told the 911 operator that his parents were dead, named the gun he had used to kill them, and was clear in communicating that there was no need to send medical assistance. When police arrived, he surrendered without incident. Police found Kucharski's father and mother in the home, dead of multiple gunshot wounds.
¶ 14. Once in police custody, Kucharski invoked his right to counsel when asked specifics about the shootings. When he was questioned by detectives, after he received his Miranda warnings, Kucharski stated, "[A]s far as the statement about most of what happened that evening and I'd rather have a lawyer here for that." When the detective reiterated his right to do that, Kucharski stated, "If you want to ask me any questions about my background or any, any other questions, fine. ... I know you want to talk about the [672]*672evening but I still rather have somebody here before I start answering questions about that night."20
¶ 15. He willingly talked to investigators without counsel present about his history, prior drug use, alcohol use, and his experience of hearing voices, which he said began five years earlier after a period of extensive drug use. He said he continued hearing the voices after he stopped using drugs. The voices he heard told him to do specific things and berated him for certain mistakes. He also disclosed that he had experienced other auditory distortions such as hearing another person's voice while a person was speaking to him. He drank heavily, which he said was an effort to quiet the voices.21 He had held jobs in prior years both in Wisconsin and in other states. In 2005 he had [673]*673returned to his parents' Milwaukee home, where he spent his time increasingly isolated, drinking daily and amassing a gun collection. He sought disability benefits for a medical condition but gave no indication at that time that he was experiencing mental health problems. He was never treated for mental health issues and never told anyone that he was experiencing them.
¶ 16. At trial, Dr. Rawski testified that Kucharski's account of the evening was that he had been present at an argument between his parents in the early evening. Afterward, he recalled, he had heard voices saying, "[J]ust [expletive] kill them, give them what they want. ..." At that point, he had gone to his bedroom to sleep. He had awakened a couple of hours later and had heard a clear voice telling him to "end it" — to kill his parents and die while engaging in a shootout with police when they arrived. At that point, he had gone downstairs and confronted his father in the kitchen and shot him. He had stepped into another room and shot his mother, apparently as she was coming toward him. Kucharski's father was shot 10 times; his mother was shot four times. He had waited a couple of hours before placing the 911 call. He stated that in the past his father had stated that if he had a medical emergency, he wished for Kucharski to delay an hour before calling 911 so that there would be no possibility of resuscitation. He stated he did so in this instance in keeping with his father's wishes.
¶ 17. Kucharski was charged with two counts of first-degree intentional homicide while using a danger[674]*674ous weapon.22 He entered an NGI plea under Wis. Stat. § 971.15.
¶ 18. Kucharski waived his right to trial on the issue of guilt, instead pleading no contest. The issue of mental responsibility was tried to the court after he waived his right to a jury. The three doctors who examined him all concluded in their reports that, as a result of his schizophrenia, Kucharski "lacked substantial capacity either to appreciate the wrongfulness of his . . . conduct or conform his . . . conduct to the requirements of law," that he satisfied both requirements of the test, and that he was therefore not mentally responsible.
¶ 19. The circuit court found that Kucharski had failed to meet his burden of proving that he was not responsible. The circuit court concluded that Kucharski did suffer from schizophrenia; however, it also concluded that the experts' opinions that he was not mentally responsible were speculative and insufficient to overcome other evidence from which it could be inferred that he appreciated the wrongfulness of his conduct and had the capacity to conform his conduct to the requirements of the law.
¶ 20. As to the question concerning his ability to appreciate the wrongfulness of his conduct, the circuit court stated, "[T]here are indications, very near the point in time that the Defendant committed these crimes, that he understood they were wrongful, illegal." For example, the court said, he had expressed the knowledge that he needed a lawyer and would be "rotting in jail" for the killings.
[675]*675¶ 21. As to the issue of whether he could conform his conduct to the requirements of the law, the circuit court stated that Kucharski had heard
command voices about killing himself, and he did not follow through with that before or after he killed his parents.... [Y]et he doesn't respond to the command voice, especially the derogatory one that he was the cause of the fight, and he should kill himself and so on, whether directly, or through a shootout with the police.
The court subsequently stated, "I'm finding him legally responsible because I'm not persuaded beyond a level scale. . . . It's not tipping, even slightly, that he lacked substantial capacity to conform his conduct to the law." The circuit court observed that "the basis of [the experts'] opinions ... is that they're speculating about what happened.
¶ 22. The court of appeals reversed, and the State petitioned for review, which we granted.
II. STANDARD OF REVIEW
¶ 23. "This court does not normally review a discretionary decision of the court of appeals. However, when [it] do[es] review a discretionary act of the Court of Appeals, [it] review [s] the decision as [it] would any other exercise of discretion."23 "[A] court erroneously exercises its discretion when it fails to set forth its reasoning and the facts of record do not support its decision. Further, a court erroneously exercisesits discretion when it proceeds under a mistaken view of the [676]*676law."24 "This court has held that it is an erroneous exercise of discretion for the court of appeals ... to shortcut [established] procedures . . . when there is no apparent reason for doing so."25 Reversals in the interest of justice should be granted only in exceptional cases.26
¶ 24. "The credibility of the witnesses is properly the function of the jury or the trier of fact, in [cases where the right to a jury is waived,] the trial judge. It is only when the evidence that the trier of fact has relied upon is inherently or patently incredible that the appellate court will substitute its judgment for that of the fact finder, who has the great advantage of being present at the trial."27
III. DISCUSSION
A. REVERSAL UNDER WIS. STAT. 752.35 WAS ERROR BECAUSE REVERSAL WAS BASED ON AN IMPROPER WEIGHING OF THE EVIDENCE WITHOUT APPLYING THE CORRECT STANDARD
¶ 25. Two of the remedies that can be sought by a defendant following conviction are an outright re[677]*677versal of a conviction and a reversal and remand. An outright reversal can be based on various grounds, including a conclusion that the evidence is insufficient as a matter of law; this results in no retrial.28 A reversal and remand for a new trial may be granted for various reasons, including when it is probable that justice has miscarried and justice requires that the evidence be presented to a new trier of fact for a verdict.29
¶ 26. We focus on the reason given by the court of appeals that it was probable that there would be a different outcome on retrial. It was clearly a reweighing of the evidence. The court of appeals stated:
We agree with Kucharski that there is a substantial probability that a new trial would produce a different result because he met his burden under Wis. Stat. § 971.15(3). See Murdock, 238 Wis. 2d 301, ¶ 31. The evidence showing that Kucharski lacked substantial capacity either to appreciate the wrongfulness of his conduct or to conform his conduct to the requirements of the law was, as we will discuss more fully below, very strong, and certainly comprised "the greater weight of the credible evidence."30
[678]*678¶ 27. It is well established that factual findings are upheld unless they are clearly erroneous.31 It is also well established that "[t]he question of whether an accused has or has not met this burden [of proving that the accused was not mentally responsible for a crime] is one of fact, not one of law for this court on appeal."32 When the proper framework is applied to an evaluation of the factual findings, the findings here must be upheld because there is no basis for saying that the findings are clearly erroneous.
¶ 28. There are four points the court of appeals identified as the basis for its conclusion.
¶ 29. The first point was that "there is no dispute that Kucharski was in fact suffering from schizophrenia when he killed his parents."33 The circuit court found that to be proved and identified the real focus of the case, stating,
I don't think there's even a doubt, much less a reasonable doubt, that Mr. Kucharski suffered from a mental illness at the time that he committed these crimes, and the name of that mental illness is schizophrenia. The close call is whether he lacked substantial capacity to conform his conduct to the law or to understand the wrongfulness of his conduct.
The court later repeated, "There's no question that he suffered from schizophrenia at the time that he engaged in that planned, purposeful, intentional behav[679]*679ior to shoot his parents to death." While this fact is listed as a reason for the court of appeals' reversal, the issue of an existing mental illness was not the basis of the circuit court's original finding of fact in support of conviction, and the conclusion that Kucharski suffered from mental illness was not an obstacle to the circuit court's decision.
¶ 30. The second point was that "the expert testimony was uncontroverted."34 It is certainly accurate to state that the doctors who examined Kucharski came to the opinion that the schizophrenia rendered him unable to appreciate the wrongfulness of his conduct and to conform his conduct to the law. But the opinions of experts are not dispositive. The trier of fact retains the sole responsibility for determining whether the defendant has met his burden. Further, we have explicitly stated that an expert's opinion, "even if uncontradicted need not be accepted by the [trier of fact]."35 This is especially true where "the defense doctors relied substantially on information provided by [the defendant]."36 That is precisely the situation in Kucharski's case. As Dr. Rawski, the testifying doctor, acknowledged, he had conducted a three-and-a-half-hour meeting with Kucharski, but he was missing much of the context he normally relies on for an NGI opinion:
In my NGI evaluation we have some glaring absences of information that we typically rely upon],] one of which is the statements of the victim or witnesses and there are none in this particular situation. Secondly - [680]*680I mean there are - there are victims but there are no statements from them about the incident.
Secondly we do not have a - a history of psychiatric evaluations over the course of time indicating the presence of mental illness and the supporting details that we look for to examine comparable contexts for similar behavior and symptoms as well, so that's absent as well, and so the evaluation and the NGI opinion, one way or another, is going to be primarily based largely upon the evidence such as the jail observations afterwards, the police observations after-wards, the random statements by neighbors who did not know Mr. Kucharski very well because of his very isolated lifestyle and based upon the limited information from that disability report.
¶ 31. Sarinske also involved a mental responsibility trial. Although the State in that case did put on an expert witness who contradicted the defense witnesses, Sarinske stated that a trier of fact may reject the opinions of an expert, even when there is no testimony to the contrary, when the basis of the expert's opinion is information substantially derived from the defendant. As Sarinske stated:
[T]he jury is free to disbelieve the defense witnesses entirely, and even if the State declines ... to present any experts in rebuttal, the accused may fail to satisfy his burden of affirmatively proving that he was suffering from mental disease. Because the defense doctors relied substantially on information provided by [the defendant], the basis of their opinion and their diagnoses could be questioned by the jury on this ground alone37
[681]*681¶ 32. The source of virtually all of the reports and interviews came down to Kucharski's own version of events and perspective. The evidence of mental health issues that preceded the murders included the defendant's own account that he had begun hearing voices about five years earlier and several pages of handwritten notes found in his room that he said were his attempts over a period of a year to document the comments the voices made. Dr. Rawski described the notes as "very bizarre and inexplicable." Therefore, under Sarinske, the fact that the expert reports were uncontroverted is not dispositive. The circuit court had no obligation in its role as the trier of fact to accept the conclusion of the experts who relied on Kucharski for their reports.
¶ 33. The third point was that "there was a complete lack of evidence of alternative explanations for Kucharski's behavior."38 The court of appeals cited to State v. Murdock, apparently for the implied proposition that absent a rational explanation for behavior, it may be inferred that the explanation is that the person lacked capacity to appreciate the wrongfulness of his conduct or conform it to the law.39 However, it [682]*682cites to no authority for the proposition that a rational explanation must be offered for a criminal act. Indeed, that approach would appear to shift the burden of proof on an NGI plea to the State. As the circuit court noted,
I think both Dr. Pankiewicz and Dr. Rawski opined that they could not find evidence of a rational, alternative motive for the Defendant's behavior. I don't disagree with that. I think shooting your parents to death with a gun, is conduct that we might not find quote unquote rational.
¶ 34. The fourth point was that the court of appeals "conclude[d] that evidence that Kucharski appeared to understand the legality of his actions and did not commit suicide as the voices directed does not mean that he was generally able to control his behavior or appreciate its wrongfulness at the time of the shooting."40 This is the crux of the court of appeals' reasoning, and it is a bare reweighing of what the evidence means, which is not permitted by a reviewing court.
¶ 35. Kucharski argues that" [t]he very nature of a test for a miscarriage of justice necessitates substitution of the appellate court's judgment for that of the factfinder." That is not correct.
[683]*683¶ 36. To agree would allow any sufficiency of the evidence claim to be converted to an interest of justice claim, thereby evading the stringent standard for reviewing findings by the trier of fact. That is contrary to the law. It would also be an inappropriate use of the power to grant discretionary reversals. Put a different way, a reversal in the interest of justice is not intended to put the reviewing court in the shoes of the trier of fact in a way that is otherwise not permitted. It is not permitted to review factual findings without employing the correct standard of review.41 The reviewing court in such a case may go only so far as to say that it is "probable" that justice has miscarried and that it concludes that "the question of defendant's guilt should be passed upon by another jury .... "42
[684]*684¶ 37. The court of appeals considered the facts of this case comparable to those of Kemp v. State,43 in which the defendant, a Vietnam veteran who had been treated extensively for war-related mental health problems, was granted a new trial after being convicted of shooting and killing his wife. The court of appeals said that "Kemp supports our decision to reverse .... " We disagree. In that case, there was evidence of pervasive and debilitating mental illness that had resulted in inpatient and outpatient treatment of the defendant over a period of years prior to the shooting.44 There was testimony from neighbors about the absence of any indication that Kemp would have intentionally killed her.45 The court of appeals also noted that in this case, unlike in Kemp, there were no experts who concluded Kucharski was mentally responsible for the killings; therefore, it concluded that reversal in this case was even more justified than in Kemp, where the experts consulted had come to varying conclusions.
¶ 38. Where a defendant seeks to mitigate punishment for a crime on the basis of mental disease or defect, it is highly relevant to consider the kind of external corroborating evidence that existed prior to the charged offense. In Kemp this court recognized this when it noted, "The record clearly reveals that this is not a case where the question of the defendant's [685]*685mental condition was asserted for the first time after the act or the commencement of a criminal prosecution under circumstances that might suggest the defense is a self-serving afterthought to avoid legal responsibility."46
¶ 39. Kucharski's, in contrast, is exactly that type of case. The expert reports dismissed concerns that Kucharski was malingering, but, contrary to the court of appeals' implication, those opinions are not dispositive. The trier of fact was not bound to accept those conclusions in light of evidence such as Kucharski's extraordinarily careful statements to law enforcement, from which contrary inferences could be drawn.
¶ 40. It is clear from Kemp that the court placed great weight on the evidence of the prior corroborated mental health problems. This single distinguishing fact is enough to make it unreasonable to view Kemp as supportive of a reversal on these facts.
¶ 41. Kemp is instructive in that it also illustrates the principle that other claims of error must be addressed before moving to a consideration of whether a case is so exceptional it warrants reversal in the interest of justice.47 Before beginning its analysis of the interest of justice claim, the court addressed one claimed evidentiary error and then noted, "The defendant has asserted other procedural errors. We have reviewed them and find no error."48 As noted above, [686]*686reversals under Wis. Stat. § 752.35 are rare and reserved for exceptional cases.49
¶ 42. In Avery, this court further noted that a determination that a case was the exceptional case that warranted such a reversal must be supported by an analysis setting forth the reasons for the determination.50
¶ 43. We have similarly held that taking "shortcuts" where a particular analysis is prescribed will be deemed error: "This court has held that it is an erroneous exercise of discretion for the court of appeals ... to shortcut [established] procedures . . . when there is no apparent reason for doing so."51 In an exceptional case, after all other claims are weighed and determined to be unsuccessful, a reviewing court may determine that reversal is nevertheless appropriate under Wis. Stat. § 752.35.
B. THE FACT-FINDING OF THE TRIER OF FACT THAT KUCHARSKI DID NOT MEET HIS BURDEN IS NOT CLEARLY ERRONEOUS
¶ 44. A reviewing court upholds the findings of fact by a trier of fact unless they are clearly erroneous. The determination of whether a party has met his or [687]*687her burden is a matter of fact, not law.52 Therefore, unless it is clearly erroneous, the court of appeals is obligated to uphold the finding that Kucharski did not meet his burden of showing by the greater weight of the credible evidence that he was not mentally responsible for the crimes.
¶ 45. We agree with the court of appeals' dissent in this case:
The trial court gave reasoned explanations for its findings on the second prong of mental responsibility. It found that Kucharski was able to appreciate the wrongfulness of his conduct, quoting the experts that Kucharski thought killing his parents was the right thing to do and quoting Dr. Rawski as saying Kucharski knew right after the shooting that he needed a lawyer. And the trial court found that Kucharski failed to meet his burden of showing that he lacked the substantial capacity to conform his conduct to the rules of law because he obeyed part of what the voices commanded and chose not to obey other parts ....
The trial court drew proper inferences from the evidence and found those inferences more reliable than the doctors' opinions as to the second prong of mental responsibility. The trial court explained that it distrusted the self-report basis for the doctors' opinions. . . .
In questioning the basis for the experts' opinion, the trial court was engaging in the same evidence weighing process that the Wisconsin Supreme Court approved in Sarinske,53
[688]*688IV. CONCLUSION
¶ 46. Applying the proper standard of review and not disturbing the factual findings of the circuit court concerning the burden of proof because they are not clearly erroneous, we conclude that the court of appeals erroneously exercised its discretion. In this case the only reason offered by the court of appeals for the new trial in the interest of justice was that court's improper de novo weighing of the evidence concerning the burden of proof on the NGI plea of the defendant. When the evidence is reviewed under the proper standard, there is not a probability of a different result on retrial such that a new trial in the interest of justice is warranted.
¶ 47. We therefore reverse the grant of a new trial under Wis. Stat. § 752.35 and remand to the court of appeals for the resolution of Kucharski's remaining unaddressed claims.
By the Court. — Reversed and remanded.