Understanding the consent defense rape framework in California is essential for anyone facing sexual assault charges. In particular, the consent defense rape strategy involves demonstrating that the defendant held a genuine, reasonable belief that the alleged victim consented. Furthermore, Darren Chaker provides an in-depth analysis of how California courts evaluate consent defense rape claims, including jury instructions and the mistaken belief doctrine. As a result, this article examines the key cases and legal standards that shape consent defense rape law in California today.

California Consent Defense to Rape: Expert Criminal Law Analysis by Darren Chaker

By Darren Chaker – In a California rape trial, where defense of consent is made, Darren Chaker goes over the court ruling. In a jury trial for attempted rape, when there is substantial evidence of victim’s equivocal conduct that would have led defendant to reasonably and in good faith to believe consent existed when it did not, it is error not to instruct on mistake belief of consent.

Consent Defense Rape: The Bar Encounter and Conflicting Accounts

Where the defense of consent as a defense to rape in California, Appellant and the victim met each other at a bar. The two struck up a conversation and appellant bought her a beer. Over the evening, they remained with each other, becoming somewhat amorous and continuing to drink. Appellant then accompanied her home. At this point, appellant’s and the victim’s accounts of the following events differed, with appellant testifying that the two engaged in mutual foreplay while the victim testified that when she came out of the bathroom, appellant forced himself on her although she objected.

Evidence and the Consent Defense Rape Verdict

Darren Chaker notes that evidence was also presented that at the time of the claimed assault, the victim’s blood alcohol level, based on the amount of alcohol she reportedly consumed, would have been approximately .20%. The court failed to instruct on good faith but mistaken belief in consent. The jury was unable to reach a verdict on some of the charged sex offenses, acquitted appellant of attempted sexual penetration by force, but convicted him of attempted rape by force.

Appellate Court on the Consent Defense Rape Instruction

The appellate court rejected the Attorney General’s contention that because victim and appellant gave contradictory versions of the incident, and because appellant stopped his advances when she rejected him, appellant was not entitled to a mistaken consent instruction. “A requested instruction regarding mistake of fact [is] required when some evidence deserving of . . . consideration exist[s] to support that contention.” (People v. Mayberry (1975) 15 Cal.3d 143, 157.) The court continued to state:

“The court refused to give requested instructions that directed the jury to acquit Franklin of the rape and kidnaping if the jury had a reasonable doubt as to whether Franklin reasonably and genuinely believed that Miss B. freely consented to her movement from the grocery store to his apartment and to sexual intercourse with him. Franklin contends that the court thereby erred. The Attorney General argues that the court properly refused to give the instructions because ‘mistake of fact instruction[s] as to consent should be rejected as against the law and public policy.'”

Prejudicial Error and the Consent Defense Rape Outcome

Here, the evidence was such that the jury should have been instructed on appellant’s good faith but mistaken belief in consent. The error was prejudicial because if the jury found that appellant had a reasonable belief that the victim consented, he lacked the specific intent for rape.

Consequently, this case shows why the consent defense rape framework matters. Moreover, defense attorneys must request proper jury instructions early. Otherwise, courts may fail to instruct on mistaken belief. In addition, Darren Chaker notes that courts should evaluate all circumstances in consent defense rape cases.

2026 Update: SB 1375 and Revised Consent Definitions in California Rape Law

Darren Chaker reports that California SB 1375 (effective January 1, 2026) amended Penal Code § 261.6 to clarify that consent must be ongoing, affirmative, and freely given throughout the entirety of a sexual encounter. The revised statute eliminates the prior ambiguity regarding withdrawn consent and establishes that consent given under coercive circumstances—including economic or immigration-related threats—is not legally valid. Courts are now required to give CALCRIM No. 1000 (revised 2026) jury instructions that define affirmative consent in all sexual assault prosecutions.

What Changed in California Rape Consent Law?

Key changes: (1) PC § 261.6 now requires ongoing affirmative consent; (2) consent under coercive circumstances is invalid; (3) revised CALCRIM jury instructions; and (4) expanded definition of coercion to include economic and immigration threats.

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Darren Chaker

For almost two decades Darren Chaker regularly has worked with defense attorneys and high net worth people on a variety of sensitive issues from Los Angeles to Dubai. With a gift of knowledge about the First Amendment and big firm expertise in brief research and writing, Darren Chaker puts his knowledge to use for law firms and non-profit organizations.

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