Proving the Defense

Proving the Defense

The limits on reliance describe what a defendant must show to bring a § 2.04(3) defense within the Code. This section turns to who must show it and who decides each part. The Code answers the first question directly: the defendant must prove a defense arising under Subsection (3) by a preponderance of the evidence, meaning that the defendant must persuade the fact-finder the defense is more likely true than not.¹ The allocation follows from where the defense sits. Under § 2.02(9), the baseline rule is that knowledge of the offense definition is not part of the mental element unless a statute clearly requires it, so the prosecution's case never includes the defendant's awareness of the law, and § 2.04(3) is an excuse layered on top of that rule.² An excuse that the defendant invokes is naturally one the defendant must establish. The practical reason is just as direct. What the defendant was told, by whom, and what the defendant did in response are facts within the defendant's own knowledge, so the defendant is the one positioned to produce the evidence, while the prosecution would be left trying to disprove conversations it never witnessed.

The burden of proof settles who must persuade, and a separate question is who decides each issue. The Barker concurrence divides the defense into parts. Whether the reliance was reasonable on an objective standard, whether the defendant actually relied on the statement, and what the statement of law said are factual issues that may go to a jury, while whether the source is an official charged with interpretation, administration, or enforcement responsibility in the relevant field is a question of law.³ The split tracks the kind of judgment each issue demands. The first three ask what happened and what a person in the defendant's position would have concluded, which are questions juries answer routinely. Official authority depends on what the legal instruments creating and governing the office provide, and reading those is ordinary judicial work that should come out the same way from one trial to the next. The Massachusetts court in the case discussed next drew the same line, describing the defense as one that generally involves factual determinations while the authority of the announcing official is obviously a question of law.⁴

The division operated in the defendant's favor in Commonwealth v. Twitchell, where parents were prosecuted for manslaughter after their child, Robyn, died while they relied on spiritual treatment instead of medical care. They pointed to an opinion of the Commonwealth's Attorney General, which a layperson might read as saying that parents who withhold medical services on religious grounds could not be prosecuted, and to a church publication that built on that opinion.⁵ The court resolved the legal question itself. The Attorney General was acting within official responsibilities as the Commonwealth's chief law officer and was statutorily empowered to give opinions on questions of law submitted by the executive branch or the Legislature. That left fact questions for the jury: whether a person would reasonably conclude the opinion protected against a manslaughter charge, and whether the defendants reasonably relied on the church's publication and the advice of its Committee on Publication.⁶ The court reversed, set aside the verdicts, and remanded for a new trial if the district attorney concluded a prosecution was still necessary.⁷ The court did not decide that the defendants had made out the defense. It decided only that they were entitled to put it to the jury. Under the Code's allocation, the defendants would then carry the preponderance burden on those fact questions.

The opposite pole appears in People v. Marrero, where a federal corrections officer was arrested in a Manhattan social club with a loaded pistol and claimed he believed his status as a peace officer let him carry it. The trial court refused to charge the jury on mistake of law, and the Court of Appeals affirmed the conviction.⁸ Marrero arose under New York's own mistake statute and not under the Code, as the preceding discussion noted, so it shows how a Code-style provision operates without construing § 2.04. The officer relied on the peace officer statute itself and on what fellow officers and teachers had said, and the court framed the central issue as whether a personal misreading of a statute can excuse criminal conduct.⁹ The two outcomes turn on whether the defendant identified a qualifying official statement. The Twitchells named a specific opinion from an officer with statutory authority to give legal opinions, so reasonableness and reliance were live questions for a jury. The officer in Marrero showed no statement of that kind, so there was no fact question for a jury to resolve.

The trap on an exam is assuming the prosecution must disprove the defense once the defendant mentions it, when under the Code the defendant carries the burden of proving it. A second error sends every issue to the jury. When a stem reports that the judge declined to instruct on mistake of law, ask whether the defendant identified an official statement from a source with legal authority over the offense. If so, reasonableness, reliance, and content are jury questions, and if not, there is nothing for the jury to decide.