Blame the situation on all 3. I don't know anything about the guy. I know that's not the typical response I hear from taking psychotropic mushrooms, but some people by a twist of fate are very oddly sensitive to things like that without being particular fucked up normally.
It's entirely possible that they'll take the mushroom thing seriously, and I'm again that because it could get the guy a weaker sentence.
I've seen some people do some crazy and violent stuff on psychedelics. Usually acid rather than shrooms, but a bad shroom trip can be really uncomfortable. Personally, I am not a fan of psychedelics at all.
Who wants to try a bottle of merc's "Extroversion Olive Oil?"