The Fourth Appellate District affirmed in part and reversed in part a judgment. The court held that in a trial for simple possession of marijuana by a defendant who was entitled to possess an amount of marijuana reasonably related to his own medical needs, a jury instruction that limited the amount of marijuana that the defendant could lawfully possess was prejudicial error.

Nathaniel Archer was a patient who was qualified to lawfully cultivate and possess medical marijuana for his own medical needs, primarily pain from a construction accident. Archer reported that he used about a half pound each month.