If that's the case and since he had traces of marijuana in his blood and urine and was caught earlier in February regarding marijuana paraphernalia and residua in a bag he carried and couldn't get his fix and got irritable and angry since then right up to the shooting?
Marijuana withdrawal And Symptoms of Marijuana Addiction
Caught and suspended for marijuana:
Multiple suspensions paint complicated portrait of Trayvon Martin - Trayvon Martin - MiamiHerald.com
And how long does marijuana stay in the body?
How Long Does Marijuana Stay in the Body?
If he did indeed assaulted a bus driver 5 days before the shooting that is perhaps because he was in a withdrawal phase and couldn't get his marijuana fix led to his irritability and anger enough to lash out at the bus driver and his aggressiveness towards GZ that night?
Who knows but it's an interesting theory. I can't put much stock into that since I don't have all of the facts before me. I'm sure the court will ask the questions on just how much he smoked marijuana and whether he was addicted to marijuana and that he got caught, so to speak, he probably had to go cold turkey that month in February which could've led to aggressiveness, anger, and irritability. Wouldn't be far fetched for the court to ask that question.