For instance, they use peyote ~ and I'm sure the sheriff knows exactly where that goes on and when.
Army officials say Loughner actually passed a urinalysis designed to detect drug use. “He didn’t fail a drug test he admitted to excessive drug use,” an Army official says. The confession was so clear that the military had no choice. “He admitted that he smoked marijuana to such an extent that we said, ‘No thank you.’ We’re not going to accept a habitual drug abuser into the Army.’” “It’s bizarre,” another official says. I certainly wouldn’t go through the whole process only to say ‘Hey, I’ve been smoking marijuana for the past couple of years.’”
http://www.time.com/time/nation/article/0,8599,2041634,00.html