mistake of fact defense (California) · Go Syfert
← California issues

mistake of fact defense in California

138 California opinions name it 4 courts 1961–2026 42 in the last five years

The cases below were cited by California courts in a sentence that names this issue. Sides come from how each citing opinion treated the case (Syfertize flag on that citation), so a case can appear on both: that is where the law is contested. A red or yellow chip is the case's own overall treatment.

Followed or applied (55)

CaseFollowedCited
People v. Lawsongreen
calctapp · 2013 · cited in 26 California opinions naming this issue, 2013–2026
2 sentences

2026(People v. Lawson, supra, 215 Cal.App.4th at p. 115 ; see id. at p. 118 [“an instruction on the defense of mistake of fact would have served . . . to negate the mental state element of the crime of theft by larceny”].) Whether there was substantial evidence to support a mistake-of-fact instruction on the robbery charge is a close call.

2026The mistake of 7. fact defense disproves criminal intent. (§ 26; People v. Lawson (2013) 215 Cal.App.4th 108, 111 [“The mistake-of-fact defense operates to negate the requisite criminal intent or mens rea element of the crime”].) Sections 266h and 266i plainly do not require the defendant to know the victim was a minor. (§§ 266h, subd. (b), 266i, subd. (b).) If the Legislature intended for the mistake of fact defense to be available for these crimes, the Legislature could have added such a knowledge requirement.

1126
People v. Russellgreen
calctapp · 2006 · cited in 26 California opinions naming this issue, 2010–2026
2 sentences

2026(Cf. People v. Speck, supra, 74 Cal.App.5th at p. 791 [where the defendant testified he believed the person from whom he borrowed the car was the rightful owner, substantial evidence supported a mistake-of-fact instruction]; People v. Russell (2006) 144 Cal.App.4th 1415, 1430 [defendant’s testimony “he thought the motorcycle was abandoned,” along with corroborating evidence, supported a mistake-of-fact instruction], disapproved on another ground in People v. Covarrubias (2016) 1 Cal.5th 838, 874, fn. 14 .) In any event, even if substantial evidence supported the instruction, and even if Arias’

2025Cordova relies upon People v. Russell (2006) 144 Cal.App.4th 1415, 1430-1433 , overruled on other grounds by People v. Covarrubias (2016) 1 Cal.5th 838, 874 (mistake-of-fact instruction where defendant found a rusty motorcycle with an expired registration near a trash bin outside a repair shop). 4 The trial court must instruct regarding the mistake-of-fact defense if defendant requests the instruction and substantial evidence supports it.

1026
People v. Mayberrygreen
cal · 1975 · cited in 10 California opinions naming this issue, 1986–2026
2 sentences

2026(People v. Mayberry (1975) 15 Cal.3d 143, 157 .) Thus, a mistake of fact defense instruction was not warranted.

2024(See People v. Maury (2003) 30 Cal.4th 342, 424 ; People v. Williams (1992) 4 Cal.4th 354 , 360–361 (Williams); People v. Mayberry (1975) 15 Cal.3d 143, 155 (Mayberry).) Nevertheless, Guenther contends that the statutory basis for the mistake of fact defense does not require the defendant’s mistaken belief to be reasonable.

710
People v. Watsongreen
cal · 1956 · cited in 16 California opinions naming this issue, 2006–2024
2 sentences

2024But “ ‘[e]rror in failing to instruct on the mistake-of-fact defense is subject to the harmless error test set forth in People v. Watson (1956) 46 Cal.2d 818, 836 .’ ” (People v. Molano (2019) 7 Cal.5th 620, 670 .) Reversal is required only if it is reasonably probable that in the absence of the error the defendant would have received a more favorable outcome.

2022Under Watson, a reviewing court must reverse if “it is reasonably probable that a result more favorable to the appealing party would have been reached in the absence of the error.” (Watson, supra, 46 Cal.2d at p. 836 .) “ ‘ “We have made clear that a ‘probability’ in this context does not mean more likely than not, but merely a reasonable chance, more than an abstract possibility.” ’ ” (Richardson v. Superior Court (2008) 43 Cal.4th 1040, 1050 , italics omitted.) The mistake of fact instruction at Hendrix’s trial told the jury that Hendrix lacked the requisite mens rea if his mistaken belief t

516
People v. Covarrubiasgreen
cal · 2016 · cited in 7 California opinions naming this issue, 2021–2026
2 sentences

2026(Cf. People v. Speck, supra, 74 Cal.App.5th at p. 791 [where the defendant testified he believed the person from whom he borrowed the car was the rightful owner, substantial evidence supported a mistake-of-fact instruction]; People v. Russell (2006) 144 Cal.App.4th 1415, 1430 [defendant’s testimony “he thought the motorcycle was abandoned,” along with corroborating evidence, supported a mistake-of-fact instruction], disapproved on another ground in People v. Covarrubias (2016) 1 Cal.5th 838, 874, fn. 14 .) In any event, even if substantial evidence supported the instruction, and even if Arias’

2025Cordova relies upon People v. Russell (2006) 144 Cal.App.4th 1415, 1430-1433 , overruled on other grounds by People v. Covarrubias (2016) 1 Cal.5th 838, 874 (mistake-of-fact instruction where defendant found a rusty motorcycle with an expired registration near a trash bin outside a repair shop). 4 The trial court must instruct regarding the mistake-of-fact defense if defendant requests the instruction and substantial evidence supports it.

57
People v. Brevermangreen
cal · 1998 · cited in 8 California opinions naming this issue, 2006–2020
2 sentences

2014Where, as here, a defendant does not rely on or request instmction on an affirmative defense, a sua sponte duty to instruct arises only “ ‘if there is substantial evidence supportive of such a defense and the defense is not inconsistent with the defendant’s theory of the case.’ ” (People v. Breverman (1998) 19 Cal.4th 142, 157 [ 77 Cal.Rptr.2d 870 , 960 P.2d 1094 ], italics omitted.) No substantial evidence supported a mistake of fact defense.

2014Where, as here, a defendant does not rely on or request instmction on an affirmative defense, a sua sponte duty to instruct arises only “ ‘if there is substantial evidence supportive of such a defense and the defense is not inconsistent with the defendant’s theory of the case.’ ” (People v. Breverman (1998) 19 Cal.4th 142, 157 [ 77 Cal.Rptr.2d 870 , 960 P.2d 1094 ], italics omitted.) No substantial evidence supported a mistake of fact defense.

48
People v. Wattgreen
calctapp · 2014 · cited in 4 California opinions naming this issue, 2015–2019
2 sentences

2019"Error in failing to instruct on the mistake-of-fact defense is subject to the harmless error test set forth in People v. Watson (1956) 46 Cal.2d 818 , 836, 299 P.2d 243 ." ( People v. Russell , supra , 144 Cal.App.4th at p. 1431 , 51 Cal.Rptr.3d 263 ; accord, People v. Watt (2014) 229 Cal.App.4th 1215 , 1219-1220, 177 Cal.Rptr.3d 871 , and cases cited; People v. Givan (2015) 233 Cal.App.4th 335 , 349, 182 Cal.Rptr.3d 592 ; People v. Hanna (2013) 218 Cal.App.4th 455 , 462-463, 160 Cal.Rptr.3d 210 ; **890 People v. Sojka , supra , 196 Cal.App.4th at p. 738 , 126 Cal.Rptr.3d 400 .) Under this st

2019"Error in failing to instruct on the mistake-of-fact defense is subject to the harmless error test set forth in People v. Watson (1956) 46 Cal.2d 818 , 836, 299 P.2d 243 ." ( People v. Russell , supra , 144 Cal.App.4th at p. 1431 , 51 Cal.Rptr.3d 263 ; accord, People v. Watt (2014) 229 Cal.App.4th 1215 , 1219-1220, 177 Cal.Rptr.3d 871 , and cases cited; People v. Givan (2015) 233 Cal.App.4th 335 , 349, 182 Cal.Rptr.3d 592 ; People v. Hanna (2013) 218 Cal.App.4th 455 , 462-463, 160 Cal.Rptr.3d 210 ; **890 People v. Sojka , supra , 196 Cal.App.4th at p. 738 , 126 Cal.Rptr.3d 400 .) Under this st

44
The People v. Hannagreen
calctapp · 2013 · cited in 15 California opinions naming this issue, 2014–2026
2 sentences

2026However, relying on People v. Hanna (2013) 218 Cal.App.4th 455 (Hanna), he takes the position that because the mistake of fact defense applies to “attempts to commit that crime,” it must also apply to kidnapping under section 207, and thus that his professed “belief that M was over 14 was a complete defense.” We find this argument without merit.

2026His reliance on Hanna, supra, 218 8 The People argue Freeman forfeited this claim by failing to request the mistake of fact instruction in the trial court.

315
People v. Olsengreen
cal · 1984 · cited in 9 California opinions naming this issue, 2013–2026
2 sentences

2026(People v. Olsen (1984) 36 Cal.3d 638 , 648–649 (Olsen); People v. Magpuso (1994) 23 Cal.App.4th 112 , 113–114.) Freeman acknowledges this in his opening brief, conceding that “as a matter of public policy, the mistake of fact defense does not apply to the commission of a lewd act on a child under the age of 14,” and citing Olsen.

2021As the Supreme Court has explained, when the mistake of fact defense regarding a victim’s age is inapplicable, the defendant commits an offense involving a minor “at his or her peril.” (People v. Olsen (1984) 36 Cal.3d 638, 649 (Olsen).) Precluding the defense renders the defendant’s mental state regarding the victim’s minority or majority immaterial.

39
People v. Gutierrezgreen
calctapp · 1986 · cited in 8 California opinions naming this issue, 1987–2022
2 sentences

2022(See People v. Drew (1978) 22 Cal.3d 333, 344 ; see also People v. Gutierrez (1986) 180 Cal.App.3d 1076 , 1082–1083 [discussing the reasons for the rule precluding evidence of mental illness as a defense to a general intent crime, or for use in a mistake- of-fact defense].) “The diminished capacity defense, which addressed an accused’s ‘general capacity or ability to form a specific intent or harbor a mental element of an offense,’ was abolished in 1982.” (People v. Reyes (1997) 52 Cal.App.4th 975, 982 , fn. omitted (Reyes); § 25, subds. (a), (b).) Consequently, evidence of a defendant’s menta

2015(See People v. Geddes (1991) 1 Cal.App.4th 448, 456 [ 1 Cal.Rptr.2d 886 ] [“we question whether a mistake-of-fact defense is appropriately utilized where defendant’s delusions are the product of mental illness and/or voluntary intoxication”]; People v. Gutierrez (1986) 180 Cal.App.3d 1076, 1081 [ 225 Cal.Rptr. 885 ] [person who commits a crime while voluntarily drunk should not escape the consequences]; People v. Scott (1983) 146 Cal.App.3d 823, 832, fn. 4 [ 194 Cal.Rptr. 633 ] [mistake of fact defense not available if the defendant’s delusions were caused by voluntary intoxication].) Here, de

38
People v. Hendrixgreen
cal · 2022 · cited in 6 California opinions naming this issue, 2022–2026
2 sentences

2026Section 26 states, in pertinent part, that “[a]ll persons are capable of committing crimes” except “[p]ersons who committed the act or made the omission charged under an ignorance or mistake of fact, which disproves any criminal intent.” The mistake of fact defense thus is “an assertion by the defendant that a particular factual error in his perception of the world led him to lack the mens rea required for the crime.” (People v. Hendrix (2022) 13 Cal.5th 933, 940 ; People v. Hernandez (1964) 61 Cal.2d 2 Defendant objected to the pinpoint instruction on the ground that the instruction was unnec

2025Three [persons are not capable of committing crimes if they ‘committed the act . . . under an ignorance or mistake of fact, which disproves any criminal intent’]; Lawson, [supra,] at p. 111 [‘The mistake-of-fact defense operates to negate the requisite criminal intent or mens rea element of the crime’]; People v. Anderson (2011) 51 Cal.4th 989 , 996–998 [same conclusion with respect to similar ‘defense’ of accident]; . . .)” (People v. Hendrix (2022) 13 Cal.5th 933 , 940, fn. omitted (Hendrix).) Mistake of fact “‘requires, at a minimum, an 4 Because the offenses with which Sanchez was charged

36
People v. Rogersgreen
cal · 2006 · cited in 3 California opinions naming this issue, 2010–2015
33
In Re Jenningsgreen
cal · 2004 · cited in 14 California opinions naming this issue, 2006–2026
2 sentences

2026We address the merits of his argument on appeal as to both counts. 5. 529, 535 (Hernandez) [“ ‘At common law an honest and reasonable belief in the existence of circumstances, which, if true, would make the act for which the person is indicted an innocent act, has always been held to be a good defense.’ ”].) Generally, “a mistake of fact defense is not available unless the mistake disproves an element of the offense.” (In re Jennings (2004) 34 Cal.4th 254, 277 .) The act of pandering is proscribed by section 266i.

2026(See In re Jennings, supra, 34 Cal.4th at p. 277 ; People v. Richards (2017) 18 Cal.App.5th 549, 563 [“[W]hen a mistake concerns only the severity of an offense, and the defendant’s conduct remains unlawful even under the defendant’s mistaken view of the facts, courts have not recognized mistake as a defense.”].) Defendant observes sections 266i and 266h do not prohibit the mistake of fact defense regarding the age of the victim.

214
People v. Andersongreen
cal · 2011 · cited in 10 California opinions naming this issue, 2013–2026
2 sentences

2025Three [persons are not capable of committing crimes if they ‘committed the act . . . under an ignorance or mistake of fact, which disproves any criminal intent’]; Lawson, [supra,] at p. 111 [‘The mistake-of-fact defense operates to negate the requisite criminal intent or mens rea element of the crime’]; People v. Anderson (2011) 51 Cal.4th 989 , 996–998 [same conclusion with respect to similar ‘defense’ of accident]; . . .)” (People v. Hendrix (2022) 13 Cal.5th 933 , 940, fn. omitted (Hendrix).) Mistake of fact “‘requires, at a minimum, an 4 Because the offenses with which Sanchez was charged

2023Code, § 26, par. [3] [persons are not capable of committing crimes if they ‘committed the act . . . under an ignorance or mistake of fact, which disproves any criminal intent’]; [People v.] Lawson [(2013) 215 Cal.App.4th 108 ,] 111 [‘The mistake-of-fact defense operates to negate the requisite criminal intent or mens rea element of the crime’]; People v. Anderson (2011) 51 Cal.4th 989, 996-998 [citation] [same conclusion with respect to similar ‘defense’ of accident]; see also, e.g., State v. Sexton (1999) 160 N.J. 93 [ 733 A.2d 1125 , 1128- 1130] [discussing the relationship between mistake o

210
People v. Hernandezgreen
cal · 1964 · cited in 8 California opinions naming this issue, 1983–2021
2 sentences

2019Stringer concedes he could find no case involving a child endangerment charge in which a court has sanctioned a mistake of fact defense regarding a victim's age, but argues such a defense was nevertheless available to him under the principles set forth in People v. Hernandez (1964) 61 Cal.2d 529 (Hernandez).

2019As the Hernandez court explained, the availability of a mistake of fact defense as to a victim's age turns on whether the defendant's mistaken belief, "if true, would [have] ma[de] the act for which the person is indicted an innocent act ...." (Hernandez, supra, 61 Cal.2d at p. 535 , italics added.) Stated differently, the defense is available where the defendant's mistaken view of facts, if correct, "would have precluded a finding of criminal intent or evil design and the defendant's conduct by itself would have been entirely innocent." (People v. Parker (1985) 175 Cal.App.3d 818, 822 .) On t

28
People v. Williamsgreen
cal · 1992 · cited in 7 California opinions naming this issue, 2005–2024
2 sentences

2024(See People v. Maury (2003) 30 Cal.4th 342, 424 ; People v. Williams (1992) 4 Cal.4th 354 , 360–361 (Williams); People v. Mayberry (1975) 15 Cal.3d 143, 155 (Mayberry).) Nevertheless, Guenther contends that the statutory basis for the mistake of fact defense does not require the defendant’s mistaken belief to be reasonable.

2024But this does not change the fact that there was no substantial evidence of “equivocal conduct [by the victims] that could be reasonably and in good faith relied on to form a mistaken belief of consent.” (Williams, supra, 4 Cal.4th at p. 364 .) Because the defense neither relied on a mistake-of-fact defense, nor presented any substantial evidence supportive of such a defense, the trial court had no sua sponte duty to give a Mayberry instruction for the oral copulation counts.

27
Chapman v. Californiared
scotus · 1967 · cited in 6 California opinions naming this issue, 2006–2021
2 sentences

2021We agree with the Attorney General’s argument that the jury would have convicted defendant even if a mistake of fact instruction had been given because the jury’s verdict indicates it rejected defendant’s defense that she was not guilty as she did not have the intent to temporarily or permanently deprive Budget of the car. 7 Defendant acknowledges that case law provides that the harmless error standard in this case is that set by People v. Watson, but she requests that this court instead apply the standard of Chapman v. California (1967) 386 U.S. 18 .

2015Watson[, supra,] 46 Cal.2d [at p.] 836”]; People v. Rogers, supra, 39 Cal.4th at p. 868, fn. 16 [an exception to the Watson standard may exist “when the error deprives the defendant of the federal due process right to present a complete defense”]; People v. Russell (2006) 144 Cal.App.4th 1415, 1431 [“[e]rror in failing to instruct on the mistake-of-fact defense is subject to” Watson test].) In an abundance of caution, we apply the more stringent “beyond a reasonable doubt” standard of Chapman v. California (1967) 386 U.S. 18 , 24 especially in light of defendant’s argument that his federal con

26
People v. Reedgreen
calctapp · 1996 · cited in 5 California opinions naming this issue, 2013–2021
2 sentences

2021Put another way, people do not act unlawfully if they commit acts based on a reasonable and honest belief that certain facts and circumstances exist which, if true, would render the act lawful. [Citations.]” (People v. Reed (1996) 53 Cal.App.4th 389, 396 .) The mistake of fact defense, as a matter of public policy, does not apply to the commission of a lewd act on a child under the age of 14 years, the crime of which defendant was convicted here.

2019(See People v. Hanna (2013) 218 Cal.App.4th 455 , 462, 160 Cal.Rptr.3d 210 ( Hanna ) [because attempt requires specific intent, mistake of fact as to age is an available defense to challenge a conviction for attempted lewd and lascivious conduct with a child under the age of 14]; but see People v. Reed (1996) 53 Cal.App.4th 389 , 397, 61 Cal.Rptr.2d 658 ( Reed ) [noting "trend toward abolition of mistake of fact as a defense to attempt crimes"].) Assuming that Hanna was properly decided, the appellate court there affirmed that public policy can bar a mistake-of-fact defense.

25
People v. Sojkagreen
calctapp · 2011 · cited in 5 California opinions naming this issue, 2015–2021
2 sentences

2021We need not decide whether the trial court erred because any error was harmless. “ ‘Error in failing to instruct on the mistake-of-fact defense is subject to the harmless error test set forth in People v. Watson (1956) 46 Cal.2d 818, 836, 299 [P.2d 243].’ ” (People v. Molano (2019) 7 Cal.5th 620, 670 .)2 “ ‘In determining whether instructional error was harmless, relevant 1 The mistake-of-fact instruction, in its entirety, was: “The defendant is not guilty of Murder if he did not have the intent or mental state required to commit the crime because he reasonably did not know a fact or reasonabl

2021We need not decide whether the trial court erred because any error was harmless. “ ‘Error in failing to instruct on the mistake-of-fact defense is subject to the harmless error test set forth in People v. Watson (1956) 46 Cal.2d 818, 836, 299 [P.2d 243].’ ” (People v. Molano (2019) 7 Cal.5th 620, 670 .)2 “ ‘In determining whether instructional error was harmless, relevant 1 The mistake-of-fact instruction, in its entirety, was: “The defendant is not guilty of Murder if he did not have the intent or mental state required to commit the crime because he reasonably did not know a fact or reasonabl

25
People v. Vogelgreen
cal · 1956 · cited in 4 California opinions naming this issue, 1992–2023
2 sentences

2023(People v. Vogel (1956) 46 Cal.2d 798 [a defendant’s bona fide and reasonable belief that he was divorced is a defense to bigamy]). 9 In Jennings, the defendant was charged with the misdemeanor of violating Business and Professions Code section 25658, subdivision (c), purchasing alcohol for a person under 21 years of age who consumes the alcohol and thereby proximately causes great bodily injury or death to the person or any other person.

1992For example, in People v. Vogel, supra, 46 Cal.2d 798 , we held that a reasonable and good faith belief that a former wife had obtained a divorce was a valid defense to a charge of bigamy arising out of a second marriage when the first marriage had not in fact been terminated. ( Id. at pp. 801, 804-805.) However, the mistake of fact defense would not have been applicable if the first marriage had in fact been terminated.

24
People v. Snydergreen
cal · 1982 · cited in 3 California opinions naming this issue, 1984–2016
2 sentences

2003If a person accused of a crime could shield himself behind the defense that he was ignorant of the law which he violated, immunity from punishment would in most cases result.’ [Citations.]” (People v. Snyder (1982) 32 Cal.3d 590, 593-594 [ 186 Cal.Rptr. 485 , 652 P.2d 42 ].) Further, even assuming for the sake of argument that appellant was entitled to a mistake-of-fact instruction, the failure to give such an instruction was harmless.

2003If a person accused of a crime could shield himself behind the defense that he was ignorant of the law which he violated, immunity from punishment would in most cases result.’ [Citations.]” (People v. Snyder (1982) 32 Cal.3d 590, 593-594 [ 186 Cal.Rptr. 485 , 652 P.2d 42 ].) Further, even assuming for the sake of argument that appellant was entitled to a mistake-of-fact instruction, the failure to give such an instruction was harmless.

23
People v. Shockleygreen
cal · 2013 · cited in 2 California opinions naming this issue, 2026–2026
22
People v. Richardsgreen
calctapp5d · 2017 · cited in 2 California opinions naming this issue, 2021–2026
22
State v. Sextongreen
nj · 1999 · cited in 2 California opinions naming this issue, 2022–2023
22
Evans v. City of Bakersfieldgreen
calctapp · 1994 · cited in 2 California opinions naming this issue, 2017–2017
22
People v. Isittgreen
calctapp · 1976 · cited in 2 California opinions naming this issue, 2017–2017
22
People v. Scottgreen
calctapp · 1983 · cited in 2 California opinions naming this issue, 1986–2015
22
People v. Mayergreen
calctapp · 2003 · cited in 2 California opinions naming this issue, 2006–2014
22
People v. Guthriegreen
calctapp · 1983 · cited in 2 California opinions naming this issue, 1984–2006
22
People v. Wickershamgreen
cal · 1982 · cited in 2 California opinions naming this issue, 1983–1989
22
People v. Braygreen
calctapp · 1975 · cited in 2 California opinions naming this issue, 1978–1984
22
People v. Maurygreen
cal · 2003 · cited in 5 California opinions naming this issue, 2006–2024
2 sentences

2024(See People v. Maury (2003) 30 Cal.4th 342, 424 ; People v. Williams (1992) 4 Cal.4th 354 , 360–361 (Williams); People v. Mayberry (1975) 15 Cal.3d 143, 155 (Mayberry).) Nevertheless, Guenther contends that the statutory basis for the mistake of fact defense does not require the defendant’s mistaken belief to be reasonable.

2014(See People v. Mayberry (1975) 15 Cal.3d 143, 154-155 [a reasonable mistake of fact regarding consent is incompatible with the existence of wrongful intent].) In any sexual assault case in which there is substantial evidence of the victim’s equivocal conduct that could have led a defendant to reasonably and in good faith believe the victim consented to the sexual act, the court must instruct the jury, even absent a request, with a mistake-of-fact instruction akin to the one found in CALCRIM No. 1015 or CALJIC No. 10.65, commonly known as a Mayberry instruction.5 (People v. Maury (2003) 30 Cal.

15
People v. Barnettgreen
calctapp · 1998 · cited in 4 California opinions naming this issue, 2006–2020
2 sentences

2020(People v. Barnett (1998) 17 Cal.4th 1044, 1145 (Barnett); see also People v. Cole (2007) 156 Cal.App.4th 452, 484 [“ ‘The threshold is not high.’ ”].) A mistake of fact defense differs based on whether the charged crime requires general intent, specific intent or knowledge of a requisite fact.

2015(People v. Barnett (1998) 17 Cal.4th 1044, 1145 ; People v. Flannel (1979) 25 Cal.3d 668, 684 ; Russell, supra, 144 Cal.App.4th at p. 1427 .) There was no substantial evidence supporting a mistake of fact instruction in this case.

14
People v. Salasgreen
cal · 2006 · cited in 4 California opinions naming this issue, 2006–2020
2 sentences

2020(People v. Salas (2006) 37 Cal.4th 967, 982 .) 5 The mistake of fact defense provides a person cannot be convicted of a crime if they acted “under an ignorance of mistake of fact, which disproves any criminal intent.” (§ 26, class Three.) The defense applies, “when the defendant holds a mistaken belief in a fact or set of circumstances, which, if existent or true, would render the 5 CALCRIM No. 3406 states as follows: “The defendant is not guilty of [insert crime[s]] if (he/she) did not have the intent or mental state required to commit the crime because (he/she) [reasonably] did not know a fa

2015Here, as in People v. Salas, supra, even if the more rigorous Chapman standard is applied, any error in failing to give the mistake-of-fact instruction was harmless beyond any reasonable doubt.

14
People v. Lucerogreen
calctapp · 1988 · cited in 3 California opinions naming this issue, 2015–2021
2 sentences

2021(People v. Lucero (1988) 203 Cal.App.3d 1011, 1016 ; § 26.) “Penal Code section 26 lists classes of persons deemed incapable of committing crimes, including ‘[p]ersons who committed the act . . . charged under an ignorance or mistake of fact, which disproves any criminal intent.’ ” (People v. Givan (2015) 233 Cal.App.4th 335, 343 .) “A ‘mistake of fact’ defense negates an element of a charged crime because it disproves criminal intent. [Citations.] However, a mistake of fact jury instruction is not appropriate where the defendant’s mistaken belief does not negate an element of the crime.” (Id.

2021(People v. Lucero (1988) 203 Cal.App.3d 1011, 1016 ; § 26.) “Penal Code section 26 lists classes of persons deemed incapable of committing crimes, including ‘[p]ersons who committed the act . . . charged under an ignorance or mistake of fact, which disproves any criminal intent.’ ” (People v. Givan (2015) 233 Cal.App.4th 335, 343 .) “A ‘mistake of fact’ defense negates an element of a charged crime because it disproves criminal intent. [Citations.] However, a mistake of fact jury instruction is not appropriate where the defendant’s mistaken belief does not negate an element of the crime.” (Id.

13
People v. Riveragreen
calctapp · 1984 · cited in 3 California opinions naming this issue, 1986–2015
2 sentences

2015(See People v. Rivera (1984) 157 Cal.App.3d 736, 743 .) The mistake-of-fact defense is based on Penal Code section 26, paragraph Three, which provides that a person is not criminally liable where he “committed the act or made the omission charged under an ignorance or mistake of fact, which disproves a criminal intent.” “Put another way, people do not act unlawfully if they commit acts based on a reasonable and honest belief that certain facts and circumstances exist which, 4 Defendant contends it is unclear whether the court actually ruled on the mistake of fact instruction.

2015(See People v. Rivera (1984) 157 Cal.App.3d 736, 743 .) The mistake-of-fact defense is based on Penal Code section 26, paragraph Three, which provides that a person is not criminally liable where he “committed the act or made the omission charged under an ignorance or mistake of fact, which disproves a criminal intent.” “Put another way, people do not act unlawfully if they commit acts based on a reasonable and honest belief that certain facts and circumstances exist which, 4 Defendant contends it is unclear whether the court actually ruled on the mistake of fact instruction.

13
People v. Younggreen
calctapp · 2001 · cited in 3 California opinions naming this issue, 2006–2015
2 sentences

2015Even if so, for the reasons discussed below, defendant was mistaken about whether his own conduct was legal. 11 Code, § 11362.5) (CUA). ( Young, supra, at p. 232 .) On appeal, he argued that the trial court erred by failing to give a mistake of fact instruction.

2006(See People v. Hernandez (1964) 61 Cal.2d 529, 535 [ 39 Cal.Rptr. 361 , 393 P.2d 673 ] [“ ‘ “At common law an honest and reasonable belief in the existence of circumstances, which, if true, would make the act for which the person is indicted an innocent act, has always been held to be a good defense.” ’ ”]; In re Jennings, supra, 34 Cal.4th at p. 279 ; People v. Young (2001) 92 Cal.App.4th 229, 233 [ 111 Cal.Rptr.2d 726 ].) Our holding is consistent with the recent decision in People v. Salas (2006) 37 Cal.4th 167 [ 38 Cal.Rptr.3d 624 , 127 P.3d 40 ], which held that guilty knowledge was not a

13
People v. Flannelred
cal · 1979 · cited in 3 California opinions naming this issue, 1983–2015
2 sentences

2015(People v. Barnett (1998) 17 Cal.4th 1044, 1145 ; People v. Flannel (1979) 25 Cal.3d 668, 684 ; Russell, supra, 144 Cal.App.4th at p. 1427 .) There was no substantial evidence supporting a mistake of fact instruction in this case.

2015(People v. Barnett (1998) 17 Cal.4th 1044, 1145 ; People v. Flannel (1979) 25 Cal.3d 668, 684 ; Russell, supra, 144 Cal.App.4th at p. 1427 .) There was no substantial evidence supporting a mistake of fact instruction in this case.

13
People v. Castillogreen
calctapp · 1987 · cited in 3 California opinions naming this issue, 2002–2006
13
People v. Hamptongreen
calctapp · 1981 · cited in 3 California opinions naming this issue, 1983–1986
13

Distinguished, questioned or overruled (1)

CaseNegativeCited
People v. Reedgreen
calctapp · 1996 · cited in 5 California opinions naming this issue, 2013–2021
2 sentences

2021Put another way, people do not act unlawfully if they commit acts based on a reasonable and honest belief that certain facts and circumstances exist which, if true, would render the act lawful. [Citations.]” (People v. Reed (1996) 53 Cal.App.4th 389, 396 .) The mistake of fact defense, as a matter of public policy, does not apply to the commission of a lewd act on a child under the age of 14 years, the crime of which defendant was convicted here.

2019(See People v. Hanna (2013) 218 Cal.App.4th 455 , 462, 160 Cal.Rptr.3d 210 ( Hanna ) [because attempt requires specific intent, mistake of fact as to age is an available defense to challenge a conviction for attempted lewd and lascivious conduct with a child under the age of 14]; but see People v. Reed (1996) 53 Cal.App.4th 389 , 397, 61 Cal.Rptr.2d 658 ( Reed ) [noting "trend toward abolition of mistake of fact as a defense to attempt crimes"].) Assuming that Hanna was properly decided, the appellate court there affirmed that public policy can bar a mistake-of-fact defense.

25

Also cited on this issue (25)

CaseCitedYears
People v. Givan green
calctapp · 2015
2 sentences

2026(People v. Givan (2015) 233 Cal.App.4th 335, 345 .) The trial court does not have a sua sponte duty to give a mistake of fact instruction.

2023It is not clear that defendant was entitled to a mistake of fact instruction on the luring count. “[A] mistake of fact jury instruction is not appropriate where the defendant’s mistaken belief does not negate an element of the crime.” (People v. Givan (2015) 233 Cal.App.4th 335, 345 .) Defendant’s actual belief that Jane was 18 years old does not necessarily negate the luring statute’s knowledge element.

132016–2026
Strickland v. Washington green
scotus · 1984
2 sentences

2026(Strickland v. Washington (1984) 466 U.S. 668, 692 .) There is no prejudice here because there was not substantial evidence to warrant a mistake of fact instruction. 8 DISPOSITION The judgment is affirmed.

2022(Strickland v. Washington (1984) 466 U.S. 668, 687 .) Here, as we have shown, the evidence was insufficient to support an instruction on the mistake of fact defense, because there was no evidence defendant actually but mistakenly believed the checks were genuine.

42021–2026
People v. Posey green
cal · 2004
2 sentences

2020(People v. Posey (2004) 32 Cal.4th 193, 218 .) As explained in Lawson, “[t]he mistake-of-fact defense operates to negate the requisite criminal intent or mens rea element of the crime, but applies only in limited circumstances, specifically when the defendant holds a mistaken belief in a fact or set of circumstances which, if existent or true, would render the defendant’s otherwise criminal conduct lawful.” (Lawson, supra, 215 Cal.App.4th at p. 111 .) For example, a defendant who finds a motorcycle next to a fenced area with trash bins inside would have a mistake of fact defense because he had

2020(Posey, supra, 32 Cal.4th at p. 218 .) In Lawson, defendant was convicted of theft for walking out of a store with a sweatshirt on his shoulder that he had not paid for. ( Lawson, supra, 215 Cal.App.4th at pp. 111-112.) On appeal, defendant argued the trial court erred by failing to instruct the jury sua sponte on the mistake of fact defense.

32020–2020
People v. Parker green
calctapp · 1985
22019–2026
People v. Mansfield green
calctapp · 1988
22026–2026
People v. Lara green
calctapp · 1996
22026–2026
People v. Molano green
cal · 2019
22021–2024
People v. Schwartz green
calctapp · 1937
22004–2023
People v. Lucas green
cal · 1995
22021–2021
People v. Martin green
calctapp · 2000
22019–2019
People v. Brooks green
cal · 2017
22019–2019
People v. Branch green
calctapp · 2010
22018–2018
People v. McNulty green
calctapp · 1988
22018–2018
People v. Curtis green
cal · 1969
22017–2017
People v. Orlosky green
calctapp · 2015
22016–2016
People v. Ramirez green
calctapp · 2006
22015–2015
People v. Uriarte green
calctapp · 1990
21991–2003
Staples v. United States green
scotus · 1994
12026–2026
People v. Mitchell green
cal · 2001
12025–2025
People v. Zinda green
calctapp · 2015
12025–2025
People v. Andrade green
calctapp · 2015
12024–2024
People ex rel. Feuer v. Superior Court of Los Angeles County green
calctapp · 2015
12023–2023
People v. Weaver green
cal · 2001
12023–2023
Rehaif v. United States green
scotus · 2019
12023–2023
People v. Bickerstaff green
calctapp · 1920
12023–2023

Statutes the citing opinions construe

CA § Cal. Evidence Code § 352 (16) CA § Cal. Penal Code § 187 (16) CA § Cal. Penal Code § 26 (14) CA § Cal. Evidence Code § 1101 (11) CA § Cal. Penal Code § 261 (10) CA § Cal. Penal Code § 236.1 (9) CA § Cal. Penal Code § 459 (9) CA § Cal. Vehicle Code § 10851 (8) CA § Cal. Penal Code § 20 (5)

Counted by distinct opinions that both name this issue and are annotated to the section; sections every opinion cites regardless of issue are not filtered here, so read the counts against the total above.

Where else courts name it

TX 186 (1983–2026) CA 138 (1961–2026) NM 29 (1978–2026) IN 27 (1985–2020) NY 19 (1975–2020) GA 17 (1975–2026) IL 14 (1991–2025) HI 14 (2002–2026) MA 11 (1988–2023) MI 9 (2000–2026) PA 9 (2000–2025) UT 7 (2009–2026) NJ 6 (1998–2021) CO 6 (1992–2016) ID 5 (1990–2022) NC 5 (1997–2020) SD 5 (1984–2024) OH 4 (2004–2019) KS 4 (2010–2023) MD 4 (2002–2025) MO 4 (1958–2013) TN 3 (1995–2015) KY 3 (1994–2021) AZ 2 (2017–2018) ND 2 (1996–2002) WI 2 (1980–1987) IA 2 (1987–2015) NV 2 (2020–2026) DC 2 (1992–2014) RI 2 (1998–2000) WA 2 (1997–1997)

Opinions by the citing court's state. A doctrine retained in one state and abandoned in another shows up here as a year span that stalls.

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