*315After a heated exchange outside a bar, defendant Nathaniel Stutelberg jabbed a box cutter at Michelle S. and Chris L., lacerating *316Michelle's head but not injuring Chris. Among other things, the jury convicted Stutelberg of mayhem with a deadly weapon enhancement as to Michelle ( Pen. Code, §§ 203, 12022, subd. (b)(1) )
As to the offense against Michelle, we conclude the instructional error was harmless beyond a reasonable doubt. We have no difficulty deciding from the record that the jury would have reached the same verdict but for the error. We reach a different result as to the crime involving Chris. Stutelberg's use of the box cutter in that encounter is more nebulous, and on the record before us we cannot conclude that the instructional error was harmless beyond a reasonable doubt. Accordingly, we reverse his conviction for assault with a deadly weapon in count 3 but otherwise affirm the judgment.
FACTUAL AND PROCEDURAL BACKGROUND
Stutelberg arrived at a bar one evening, intoxicated and wearing no shirt. He was yelling and arguing with the bouncer and assistant manager, who were denying him entry into the bar. A few minutes later, Stutelberg retreated from the bar but continued to yell at the bouncer and assistant manager while standing next to his friend's car. Michelle, a bar patron, approached the female passenger sitting in the parked car. She urged the woman to take Stutelberg home to prevent police from being called. In response, the woman left the car and ran towards Michelle, who held out her right hand and told the woman to "back up."
Michelle's friend Chris and Missael O., a bar employee, walked toward Michelle. Stutelberg started "flicking" a box cutter toward their faces. Chris yelled that he saw a knife. Stutelberg swung a fist at Chris but missed. Michelle grabbed Stutelberg and pushed him into a light pole. Stutelberg punched Michelle and cut the back of her head with the box cutter.
The San Diego County District Attorney charged Stutelberg by amended information with aggravated mayhem against Michelle (§ 205, count 1), attempted aggravated mayhem against Chris (§§ 205, 664, count 2), assault with a deadly weapon against Chris (§ 245, subd. (a)(1), count 3), attempted aggravated mayhem against Missael (§§ 205, 664, count 4), and assault with a deadly weapon against Missael (§ 245, subd. (a)(1), count 5). Counts 1, 2, and 4 carried an enhancement for personal use of a deadly or dangerous weapon ( § 12022, subd. (b)(1) ). All five counts were classified as "serious"
*317felonies under section 1192.7, subdivision (c)(23) based on Stutelberg's alleged personal use of a deadly or dangerous weapon. Count 1 was additionally classified as a serious felony based on the allegation Stutelberg personally inflicted great bodily injury on Michelle (§ 1192.7, subd. (c)(8) ).
The jury convicted Stutelberg of mayhem ( § 203 ), a lesser included offense of count 1 against Michelle and found true the deadly weapon enhancement and great bodily injury and deadly weapon allegations attached to that count. It also convicted him of assault with a deadly weapon (§ 245, subd. (a)(1) ) on count 3 against Chris, finding the deadly weapon allegation true. It acquitted on counts 2, 4, and 5.
The court sentenced Stutelberg to a three-year prison term on count 1, consisting of the two-year low term plus a year for the deadly weapon enhancement. It imposed a concurrent two-year low term sentence on count 3.
DISCUSSION
To consider the assault with a deadly weapon charge in count 3 and the deadly *159weapon enhancement in count 1, the jury had to determine whether the box cutter Stutelberg used was a deadly weapon. The court instructed jurors under CALCRIM No. 875, the assault instruction, in part that:
"A deadly weapon other than a firearm is any object, instrument, or weapon that is inherently deadly or one that is used in such a way that it is capable of causing and likely to cause death or great bodily injury."
It also provided the jury with CALCRIM No. 3145 as to the enhancement, which contained similar language:
"A deadly or dangerous weapon is any object, instrument, or weapon, that is inherently deadly or dangerous, or one that is used in such a way that it is capable of causing and likely to cause death or great bodily injury. [¶] In deciding whether an object is a deadly weapon, consider all the surrounding circumstances, including when and where the object was possessed and any other evidence that indicates whether the object would be used for a dangerous, rather than a harmless, purpose."
These instructions are flawed because they suggest the jury might properly conclude that a box cutter is inherently dangerous. A box cutter, however, is not an inherently deadly weapon as a matter of law. ( People v. McCoy (1944)
The parties do not dispute that the inclusion of language regarding an "inherently deadly weapon" in CALCRIM No. 3145 was instructional error.
*318Instead, they disagree on whether the error was prejudicial. That narrow question turns on a two-step inquiry: (1) whether the error was factual error or legal error; and (2) what prejudice standard applies.
As we explain, the instructional error in this case is legal in nature, and we therefore employ the traditional Chapman standard to evaluate prejudice. ( Chapman v. California (1967)
1. The instructions presented a legally (rather than factually) invalid theory
As noted, the jury in this case should not have been instructed on an "inherently dangerous" weapon. The only weapon involved in the case was a box cutter, and it is not inherently dangerous as a matter of law. The threshold question is whether this error was factual or legal. Stutelberg contends the error was legal, whereas the People claim the error was factual. We conclude Stutelberg is correct.
A legal error is an incorrect statement of law, whereas a factual error is an otherwise valid legal theory that is not supported by the facts or evidence in a case. ( People v. Guiton (1993)
The People argue the error was factual because the jury was simply given otherwise correct instructions about a legal theory that was inapplicable to the facts of the case. In other words, because a box cutter is not inherently dangerous, the jury was presented with a factually inapplicable theory even though the instruction may have been a correct statement of law in the abstract.
We disagree. An "inherently deadly or dangerous" weapon is a term of art describing objects that are deadly or dangerous in "the ordinary use for *319which they are designed," that is, weapons that have no practical nondeadly purpose. ( People v. Perez (2018)
We agree with People v. Aledamat (2018)
"There was no failure of proof-that is, a failure to show through evidence that the box cutter is an 'inherently dangerous' weapon. Instead, a box cutter cannot be an inherently deadly weapon 'as a matter of law.' [Citation.] This is functionally indistinguishable from a situation in which a jury is instructed that a particular felony can be a predicate for felony murder when, as a matter of law, it cannot be." ( Ibid. )3
2. We evaluate prejudice under the Chapman standard
The parties agree that we apply the Chapman standard ( Chapman , supra , 386 U.S. at p. 24,
As recently as 2017, the Supreme Court held that error in instructing on the elements of a crime is harmless "so long as the error does not vitiate all of the jury's findings" ( People v. Merritt (2017)
As a practical matter, evidence regarding the effect of statements or events on the mental processes of a juror is inadmissible to impeach a verdict. ( Evid. Code, § 1150, subd. (a).) To conclude as Stutelberg urges that Chapman , supra ,
3. Applying Chapman reveals harmless error as to count 1 but prejudice as to count 3
The flawed deadly weapon instruction related to (1) the one-year deadly weapon enhancement for the mayhem charge (as to Michelle); and (2) the assault with a deadly weapon charge (as to Chris). Because the jury received different evidence and testimony as to each encounter, we must independently analyze prejudice as to each conviction.
a. Michelle (count 1 , mayhem with a deadly weapon enhancement )
The error was harmless as to the deadly weapon enhancement for the mayhem conviction. The evidence and testimony clearly indicated that Stutelberg sliced the back of Michelle's head from her left temple to the bottom of her hairline during a bar fight. After he swung at Chris but missed, Michelle pushed him into a light pole, sparking a physical altercation between Stutelberg and Michelle. Several witnesses testified that they saw him stab the back of Michelle's head with a box cutter. Stutelberg conceded using the box cutter to lacerate Michelle but claimed he did so in self-defense.
The error as to Michelle is similar to the one held harmless in Brown , supra ,
"[T]here was ample evidence at trial Brown used the BB gun in a manner capable of inflicting and likely to inflict great bodily injury. That evidence, as well as the arguments of counsel, leave no reasonable doubt the jury found Brown guilty on this basis and not because it concluded the BB gun, regardless of the manner in which it was used, was 'inherently dangerous.' " ( Id. at p. 13,147 Cal.Rptr.3d 848 .)
*322The evidence and the arguments of counsel here likewise created no reasonable doubt as to whether the jury would decide Stutelberg used the box cutter as a deadly weapon against Michelle under the proper definition. Using a sharp box cutter to stab a victim's head undoubtedly qualifies as using the item "in such a way that it is capable of causing and likely to cause death or great bodily injury," as shown by the bodily injury that resulted. ( Brown , supra , 210 Cal.App.4th at p. 11,
*163The prosecutor's closing argument likewise did not suggest Stutelberg suffered any prejudice. As the parties agree, the prosecutor did not expressly refer to the "inherently deadly weapon" theory. Nor did his other statements invite the jury to classify the box cutter as inherently deadly. Stutelberg is correct that the prosecutor stated "personal use of a deadly weapon" means that "when he committed the crime, he was armed with a razor blade." But the prosecutor went on to discuss Stutelberg's use of the razor blade to "swipe" at the victims and to "slash open" Michelle's face. The statements in their totality did not direct the jury to conclude the box cutter was inherently deadly by default; rather, they point to ample grounds for the jury to infer that Stutelberg used the box cutter to "swipe" and "slash open" victims in a manner likely to cause or causing injury. Had the jury been provided only with the "deadly or dangerous as used" theory and not the inapplicable "inherently deadly weapon" theory, there is no reasonable probability it would have rejected the deadly weapon enhancement on count 1. Therefore, the instructional error was harmless beyond a reasonable doubt.
b. Chris (count 3, assault with a deadly weapon )
We reach a different result as to Stutelberg's assault with a deadly weapon conviction in count 3 involving Chris. Unlike Michelle, whom Stutelberg severely injured, Chris was not harmed. Stutelberg "swung" at Chris but missed. It is unclear which arm Stutelberg swung and if he was holding the box cutter in that same hand. On cross-examination, Chris admitted that it "wasn't as though [Stutelberg] had a razor in his hand and he's jabbing at [his] face." Although Missael testified that Stutelberg jabbed a box cutter at both Chris and him in a manner likely to cause great bodily injury, the jury apparently disbelieved his testimony, acquitting Stutelberg of assault with a deadly weapon against Missael. The exact manner in which Stutelberg used the box cutter against Chris is thus unclear. The jury could reasonably conclude that his "flicking" motion was more of a threat, as opposed to an act likely to cause death or great bodily injury. Under these circumstances, we cannot say that the court's error in instructing the jury regarding an inherently dangerous weapon was harmless beyond a reasonable doubt.
*323The error is prejudicial for reasons similar to those found in People v. Hudson (2006)
DISPOSITION
The judgment of conviction as to count 3 is reversed and the matter is remanded for further proceedings consistent with this opinion, which may include retrial on count 3 and/or recalculation of applicable fines and fees. In all other respects, the judgment is affirmed.
WE CONCUR:
IRION, Acting P. J.
GUERRERO, J.
Further statutory references are to the Penal Code, unless otherwise indicated.
The Supreme Court granted review in Aledamat to address the appropriate standard for evaluating prejudice resulting from legal error. As we explain, although we agree with Aledamat that the error was of a legal nature, we part ways in deciding the appropriate standard for prejudice. Pursuant to California Rules of Court, rule 8.1115, subdivision (e)(1), we cite Aledamat solely for its persuasive value.
We disagree with the People's claim that this case is "strikingly similar" to Guiton , supra ,
As the People explain, applying the usual Chapman standard does not necessarily conflict with Guiton . Guiton acknowledged that instructional error of a legal nature might be found harmless in certain cases, where "it is possible to determine from other portions of the verdict that the jury necessarily found the defendant guilty on the proper theory." (Guiton , supra , 4 Cal.4th at p. 1130,
Stutelberg suggests that reversal will require the trial court to recalculate certain fines and fees ordered at sentencing. These are issues for the trial court to address in the first instance following retrial, if any, on count 3. If the prosecution does not retry Stutelberg on count 3, or if he were acquitted on retrial, the court would need to recalculate the restitution fine (§ 1202.4, subd. (b)(1) ), suspended parole revocation fine (§ 1202.45), victim restitution (§ 1202.4, subd. (f) ), and levied fees (§ 1465.8; Gov. Code, § 70373 ) insofar as they are predicated on two felony convictions.
