When a Mistake of Fact or Law Can Be a Defense in Florida

If you’ve been charged with a crime in Florida, you may wonder if you can argue that you made an honest mistake. While a mistake doesn’t make your actions legal, in some cases, it can provide a defense that could lead to an acquittal or dismissal of charges. Let’s take a closer look at how mistakes of fact and mistakes of law work as criminal defenses under Florida law.

What is a Mistake of Fact?

A mistake of fact means you misunderstood or were unaware of a fact relevant to the charge. Suppose Jamie shoves a man at a bar without knowing that the man is an undercover police officer. That lack of knowledge may defeat the knowledge requirement for battery on a law enforcement officer. It would not, by itself, defeat an ordinary battery charge.

Whether a factual mistake provides a defense depends on the criminal intent required for the offense. The key question is whether the evidence leaves a reasonable doubt about an element the State must prove. An honest mistake does not automatically excuse intentional conduct.

A lawyer can assess whether the mistake undermines the prosecution’s proof or whether the facts support another defense to criminal charges.

For example, someone charged with insurance fraud may have submitted a claim containing inaccurate information while honestly believing it was true. Depending on the evidence, that factual mistake may undermine proof that the person knowingly submitted false information with intent to injure, defraud, or deceive the insurer.

Common Uses of Mistake of Fact

Mistake-of-fact arguments often arise in theft cases. Someone who honestly believed the owner permitted them to take or use property may lack the intent required for theft. The surrounding facts will matter in deciding whether that belief was genuine.

Different rules apply in sex crime cases. For offenses under section 800.04, including lewd or lascivious conduct, neither the minor’s consent nor an honest mistake about the minor’s age provides a defense.

A mistaken belief about a threat may also matter under Florida’s self-defense laws. For nondeadly force, the person must reasonably believe the force is necessary to defend against another person’s imminent use of unlawful force. An honest but unreasonable fear does not satisfy that standard.

A reasonable belief about an apparent threat can also matter in a homicide case. Deadly force requires a reasonable belief that it is necessary to prevent imminent death, great bodily harm, or the imminent commission of a forcible felony, subject to the other requirements of Florida law. A mistake does not excuse conduct merely because the person meant well.

When Mistake of Age Is Not a Defense

Under section 794.021, Florida Statutes, when an offense in chapter 794 depends on the alleged victim being below a specified age, ignorance of that age, a false statement about age, or an honest belief that the person was older does not provide a defense.

Section 800.04(2)–(3) separately bars consent and mistake-of-age defenses for offenses covered by that section. These rules do not relieve the State of its duty to prove the alleged victim’s actual age and every other required element.

When Mistake of Law Can Work as a Defense

Not knowing that conduct was illegal usually does not provide a defense. Whether a misunderstanding of the law matters depends on the charged offense and the rules governing it.

Knowledge of illegality. If the offense requires proof that the defendant knew the conduct was unlawful, an honest misunderstanding may undermine that proof. The word “willfully” does not always impose that requirement; courts interpret it in the context of the particular statute.

Advice of counsel. Florida recognizes an advice-of-counsel defense for certain specific-intent crimes. In Aversano v. State, the court held that the evidence supported a defense instruction where the defendant sold property after receiving a lawyer’s advice that she could do so. Consulting a lawyer does not provide a general defense to criminal charges.

Fair notice. Due process can limit punishment in narrow circumstances. In Lambert v. California, the Supreme Court overturned a conviction for a passive failure to register where the defendant lacked knowledge of the duty and there was no proof of the probability of that knowledge. Merely overlooking a law or finding it obscure does not establish the same defense.

Scope and Limits of Mistake Defenses

A mistake must matter to an element of the charged offense or to a recognized defense. Courts examine what the person believed, the evidence supporting that belief, and whether the applicable law requires the belief to be reasonable. Some statutes expressly exclude particular mistake defenses. An honest mistake alone does not guarantee an acquittal.

Work with a Skilled Criminal Defense Attorney

Facing criminal prosecution is scary, especially if you feel you made an honest mistake. While mistake defenses can be difficult to win, an experienced criminal defense lawyer may help reduce or dismiss charges by raising valid mistake claims. An attorney can also advise if arguing a mistake seems fruitless or even counterproductive in a particular case.

The skilled criminal defense attorneys at our firm have extensive experience handling all types of criminal allegations in Florida. Contact us today for a free case evaluation and see how our skills and deep knowledge of mistake defenses could benefit your case. With the right presentation of the evidence and law, an honest mistake may still lead to a positive resolution. Don’t wait to get advice on your options.

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