Police officers searched James Taylor’s (defendant) home and found methamphetamine, marijuana, psilocybin mushrooms, a gun, and over $8,000 in cash. Six months later, police officers also searched a storage room leased by Taylor. They found more marijuana and psilocybin mushrooms, multiple guns and ammunition, and a cane sword. The State of California (plaintiff) charged Taylor with several crimes, including the possession of a cane sword. The trial court did not instruct the jury that Taylor must have known that the cane concealed a blade in order to be convicted of possessing a cane sword. The jury convicted Taylor, and he appealed.