I have a friend who was arrested for possession of ecstasy, LSD, and methamphetamine because of melatonin pills in his pants pocket that tripped the field tests. He was in acute psychosis from some hallucinogen and running around the municipal building half-naked (shirt only, no pants) screaming at people. When the police found his pants, they discovered “pills containing LSD.”
I was serving grand jury earlier this year and a cop on the drug task force was giving testimony. At one point he mentioned “a quarter ounce” and the prosecutor asked him to clarify the weight in grams. The cop didn’t know. This cop also blew a 3-month wiretap investigation by pulling over a junkie who recognized him from another town and knew he had no business being in an unmarked police car a few towns over.