delivered the Opinion of the Court.
Wayne Partin (Partin) appeals from the judgment and commitment entered by the Thirteenth Judicial District Court, Yellowstone County, on a jury verdict finding him guilty of the felony offense of forgery. Specifically, he appeals from the District Court’s denial of his motion for a mistrial following testimony which violated an order in limine. We reverse and remand for a new trial.
*14 The issue on appeal is whether the District Court abused its discretion in denying Partin’s motion for a mistrial.
BACKGROUND
The State of Montana (State) charged Partin with committing the offense of forgery by allegedly altering the payee line of a check to include his name, signing the back of the check, and cashing it. Prior to trial, Partin’s counsel orally moved the District Court in limine to exclude expected testimony from the State regarding other crimes or acts based on the State’s failure to provide Partin with a Just notice of intent to use such evidence. In particular, the motion sought to preclude any reference to the fact that certain handwriting samples were on file at the Billings Police Department due to a prior arrest of Partin. The State did not oppose the motion and, indeed, assured the District Court it did not intend to go into Partin’s criminal history or record. The prosecutor also stated that she had spoken to Detective Dave Comfort, the State’s handwriting expert, about avoiding any mention of Partin’s prior arrest during his testimony comparing the writing on the check at issue to prior handwriting samples from Partin, and that she would stop him should he begin to verge into such “prior crimes” testimony. The District Court granted the motion in limine.
At trial, Ron Hill (Hill) testified that he had written, and mailed, the check at issue to AAA Drywall in September of 1995. He further testified that the payee line of the check had been altered to include “/W. Partin.” He stated that, in response to notification by AAA Drywall that it had not received the check, he called the bank to stop payment on the check and was informed that the check had already been cashed.
The bank teller who cashed the check testified that she did not remember the transaction, but that her teller stamp on the check indicated she had cashed it on September 9, 1995. She also had written a social security number on the check, reflecting that she had seen some form of identification containing the customer’s social security number and signature. According to the teller, the identification may have been, but was not necessarily, a driver’s license.
After being qualified as an expert in handwriting analysis, Detective Comfort testified that he had compared both the added writing on the payee line and the signature on the back of the check with several handwriting samples provided by Partin, two of which had been admitted into evidence. The State then asked Detective Comfort *15 to identify the source of other handwriting samples he had used for his analysis and he responded that they were fingerprint cards from Partin’s previous arrest.
Defense counsel objected and moved for a mistrial on the grounds that Detective Comfort’s statement regarding the prior arrest violated the District Court’s grant of the motion in limine and constituted other crimes evidence. Out of the jury’s presence, the State contended that evidence of a prior arrest was not, technically, other crimes evidence. The prosecutor urged that a cautionary instruction would correct any error because the jury “won’t necessarily be biased against the defendant just by the fact [Detective Comfort] mentioned [Partin] was arrested in the past.” The District Court expressed disappointment with Detective Comfort’s testimony and ascribed it to nervousness. The court subsequently gave a cautionary instruction admonishing the jury to consider only the facts and not prior crimes allegedly committed, and that Detective Comfort should not have testified that there had been a prior arrest of Partin.
The trial continued and Detective Comfort ultimately opined that it was probable that Partin altered the front of the check. He also testified that it was highly probable that Partin endorsed the back of the check.
Partin then testified on his own behalf, denying that he altered the front, or signed the back, of the check. He testified that his roommate had stolen various items, including his wallet, from his house in August of 1995, and that his driver’s license, and perhaps his social security card, were in the wallet. This theft was reported to the police.
The jury found Partin guilty of the offense of forgery, a felony, and the District Court subsequently sentenced him and entered judgment. Partin appeals from the denial of his motion for a mistrial.
STANDARDS REGARDING MISTRIAL MOTIONS
We recently clarified the standard to be applied by a district court in determining whether to grant a motion for a mistrial. Observing that we had not consistently stated that standard in earlier cases, we held that a district court should grant a motion for a mistrial “when there is
either
a demonstration of a manifest necessity,
or
where the defendant has been denied a fair and impartial trial.”
State v. Ford
(1996),
*16
We have not previously determined when a district court should apply the manifest necessity standard as opposed to the denial of a fair and impartial trial standard. That subissue was addressed, however, in a special concurring opinion in
Romero,
Justice Leaphart noted, at the outset, that
United States v. Perez
(1824),
In the context of a defendant’s motion for a mistrial, however, Justice Leaphart relied on
Oregon v. Kennedy
(1982),
We adopt the rationale set forth in Justice Leaphart’s special concurring opinion in Romero and conclude that the more stringent manifest necessity standard applies when a trial court considers declaring a mistrial without the defendant’s request or consent. We further conclude that the denial of a fair and impartial trial standard applies when a trial court determines whether to grant a mistrial *17 either moved for — or consented to — by the defendant. Thus, the fair and impartial trial standard applies to the District Court’s ruling on Partin’s motion for a mistrial based on inadmissible testimony which violated the order in limine.
With regard to this Court’s standard of review of a district court’s ruling on a motion for a mistrial, the parties advance different positions based on two separate lines of authority. The State relies on recent language in
Ford,
The problem with the Ford standard — whether there is clear and convincing evidence that the trial court’s ruling is erroneous — is that clear and convincing evidence is an evidentiary standard. Indeed, we recently defined clear and convincing evidence as:
“[c]lear and convincing proof is simply a requirement that a preponderance of the evidence be definite, clear, and convincing, or that a particular issue must be clearly established by a preponderance of the evidence or by a clear preponderance of proof. This requirement does not call for unanswerable or conclusive evidence. The quality of proof, to be clear and convincing, is somewhere between the rule in ordinary civil cases and the requirement of criminal procedure — that is, it must be more than a mere preponderance but not beyond a reasonable doubt.”
Matter of J.L.
(1996),
DISCUSSION
Did the District Court abuse its discretion in denying Partin’s motion for a mistrial?
It is undisputed in this case that Detective Comfort’s reference to fingerprint cards from Partin’s prior arrest as the source of handwriting samples violated the District Court’s order in limine and, therefore, was inadmissible. Partin moved for a mistrial, arguing that the testimony had such a prejudicial impact that a cautionary jury instruction could not cure the error. The State contended that Detective Comfort’s reference to the prior arrest did not necessarily indicate a prior conviction and that a cautionary jury instruction was sufficient to cure any error. The District Court denied Partin’s motion and the question before us is whether, under the facts and circumstances of this case, the court abused its discretion in determining that Detective Comfort’s reference to Partin’s prior arrest did not deny Partin a fair and impartial trial.
The general rule is that, where there is a reasonable possibility that inadmissible evidence might have contributed to the conviction, a mistrial is appropriate.
See Walker,
We begin by addressing the strength of the evidence against Partin in the context of whether there is a reasonable possibility that Detective Comfort’s reference to a prior arrest might have contributed to Partin’s conviction. No eyewitnesses tied Partin to the offense. Although Hill testified that the check had been altered and the bank teller testified that she cashed the check, neither one could identify Partin or link him to the check. Therefore, Detective Comfort’s testimony regarding the handwriting analysis he performed was the only link between Partin and the offense.
On direct examination, Detective Comfort testified to the consistencies between the handwriting samples and the writing on the check and concluded that, in his opinion, it was probable that Partin altered the payee line of the check and highly probable that Partin signed the back of it. He further testified that he uses a six-step *19 grading scale which ranges from a positive match downward through a high probability, a probability, a possibility, and some indications to no indications of a match. Therefore, Detective Comfort was able to assign only the second highest grade to the results of his analysis of the endorsement on the back of the check. He also testified that his analysis indicated that Partin’s signature was “consistent with the writing on the back of the check” before going on to testify that it was “highly probable” that Partin had endorsed the check. During cross-examination, various inconsistencies between the handwriting samples and the writing on the check were pointed out. The inconsistencies included the fact that the signature on the handwriting samples turned into a straight line, while the signature on the check turned into a “squiggly” line. In addition, the handwriting samples all contained an “a” that was absent from the signature on the back of the check. Indeed, Detective Comfort testified that it was possible someone else could have endorsed the check.
After the close of the State’s case, Partin testified on his own behalf that he did not steal the check, alter the payee line, or endorse the back and cash it. He also testified that his roommate had stolen his wallet — which contained his driver’s license and possibly his social security card — and that he reported the theft to the police.
The lack of eyewitness testimony connecting Partin to the check in any way, together with Detective Comfort’s handwriting analysis producing a less than positive match, result in evidence against Partin which is far short of being overwhelming. Furthermore, the inconsistencies in Detective Comfort’s analysis and the other weaknesses in his results were effectively highlighted during cross-examination. Finally, Partin testified that he did not forge the check and advanced an alternative explanation which was not inherently incredible. Overall then, the evidence against Partin was conflicting and relatively weak.
The prejudicial effect of Detective Comfort’s reference to Partin’s prior arrest must also be considered.
See Walker,
*20
We have stated, without analysis, that testimony about the existence of a pending charge in another state is not other crimes evidence.
Ford,
First, if the State desired to take the position that the prior arrest was not other crimes evidence, it should have done so in response to Partin’s pretrial motion in limine to preclude reference to a prior arrest. It not only did not do so, it acquiesced in the motion. Then, having elicited the very testimony it agreed was inadmissible, the prosecutor responded to Partin’s motion for a mistrial by arguing the purported distinction between other crimes evidence and testimony referencing only a prior arrest. The State repeats that argument on appeal, but we will not countenance such position-shifting by addressing that argument here.
Second, regardless of whether Detective Comfort’s reference to Partin’s prior arrest is other crimes evidence under Just and Rule 404(b), M.R.Evid., testimony that a defendant has been arrested on a prior occasion is inherently prejudicial. If it were not, there would be no reason for a motion in limine to preclude such evidence. Further, the prosecutor’s acquiescence in — and the District Court’s grant of — the motion in limine in this case reflect that all involved conceded the prejudicial effect of evidence that Partin had been arrested on a prior occasion. This is especially true when, as in this case, the only evidence directly linking Partin to the check at issue is the testimony of the very officer who also disclosed the previous arrest, and the only defense witness is the defendant. Under such circumstances, the reference to the prior arrest may have buttressed the officer’s other testimony and, at the same time, impugned the defendant’s credibility and character. On this record, we conclude that Detective Comfort’s reference to Partin’s prior arrest was prejudicial.
Regarding the extent of the prejudice, the State argues that Detective Comfort’s reference to Partin’s prior arrest is no more prejudicial than the officer’s reference to other charges pending against the defendant in Ford. Because we determined that reference had only a slight prejudicial effect and affirmed the denial of that defendant’s *21 motion for a mistrial, the State contends we should do the same in the present case.
In
Ford,
the victim testified that Ford had sexually assaulted him and that, when confronted the next day, Ford admitted what he had done.
Ford,
In Ford, the evidence against the defendant was very strong. Here, as discussed above, the evidence against Partin was weak and conflicting. There were no eyewitnesses to any involvement by Partin with the check at issue. Nor was there testimony corroborating Detective Comfort’s opinion that the writing on the check was Partin’s and, as discussed above, the weaknesses in Detective Comfort’s handwriting analysis and opinion were highlighted effectively during cross-examination. Since the stronger the evidence against the defendant, the less likely it is that a reference to other charges or a prior arrest will have a prejudicial effect, we conclude that the reference to Partin’s prior arrest had a greater prejudicial effect than the reference to other charges in Ford.
Finally, we turn to the question of whether the District Court’s cautionary instruction could cure the prejudicial effect of Detective Comfort’s reference to Partin’s prior arrest. Generally, “an error in the admission of evidence may be cured if the jury is admonished to disregard it.”
Walker,
In
Walker,
another felony forgery case, an officer referenced past forgery investigations involving the defendant at a point during trial when another officer had testified that three bank employees identi
*22
fied the defendant in a photo line-up.
Walker,
Clearly, the admonition to the jury in
Walker
was not the only factor we considered in determining that the prejudicial effect of the reference to past investigations had been overcome. The strong evidence against the defendant — including that of three eyewitnesses — was an important underpinning for our conclusion that the prejudice was cured.
See Walker,
Based on the record before us here, we conclude that there is a reasonable possibility that Detective Comfort’s reference to Partin’s prior arrest might have contributed to Partin’s conviction and, as a result, that Partin was denied a fair and impartial trial. We hold, therefore, that the District Court abused its discretion in denying Partin’s motion for a mistrial.
Reversed and remanded for a new trial.
