I find it HIGHLY unlikely that your son willingly took LSD at WORK. LSD is not something you want to be taking in an enviroment where there is the LEAST bit of stress and with people around that aren't on it themselves. I've always been under the assumption that the only way to test for LSD is by a spinal tap because the strychnine goes straight to your nervous system and is stored in your spinal fluid which could account for the tensing up of your neck when your on it. What happened is this, if your son's personality and demeanor changed after the encounter it's because he had a "bad trip" , LSD allows you to explore depths of your brain and psyche and that you wouldn't do with a straight head. It litterally makes you think of 100 things at once. He had a bad trip because he wasn't prepared for it, which leads me to believe that his story checks out about it not being his, because anybody who knows ANYTHING about LSD knows that a bad trip really does screw you up and the LAST place you'd want to trip is at work. If those co-workers were to testify to actually seeing the "hits" being dropped in his coffee than I'd say you and your son have one HELL of a case against the assailant. HOWEVER, in the drug underworld people don't snitch on their friends and it would be close to impossible to get the testimony you need from the eyewitnesses. I'd see if there is any kind of security cameras that could have captured the deed rather than trying to coax the co-workers.
--I'am NOT a Lawyer or Legal Professional, I'm JUST a former partier.
