I thought I would opine here, as someone who is both prescribed Adderall as well is rather well versed in close quarters combat and defensive pistol craft.
So, starting with Adderall. It is mixed amphetamine Salts, so yes, it is essentially speed. ADHD is an actual chemical imbalance in the brain. Typically evidenced by abnormally low dopamine levels in the synapses. If a person without abnormally low levels were to take Adderall, it would act as any stimulant does and the person would "speed" due to the excessive presence of neurotransmitters in the brain. However, for those like myself, it merely causes what is supposed to be there, to actually be there. I feel normal. In fact, I feel greatly less agitated and much more calm when I am on my medication. If fact, truth be told, our long distance Aviator's take the stimulant on mission, such as those B2 Pilots and others flying long distance missions. It heightens awareness and prevents drowsiness. 2 things you do not want when you are flying a half billion dollar aerial bombing platform. Adderall did not make GZ psychotic, a danger, or incapable of proper decision making assuming the medication was being taken at therapeutic levels. In fact, decision making capability is increased in ADHD patients.
As for the firearm and defensive pistol craft. I carry a firearm every day. Some things that are missed or ignored is that most who carry a firearm know the 20 foot rule. Meaning that anytime someone is within 20 feet, that they can cover the distance and attack you before you are able to draw and fire. So, as a result you do everything you can to prevent that from occurring. If GZ's intent was to draw down on TM and detain him, he would have done so with his weapon drawn. Meaning that GZ likely would not have let TM get close enough to swing. That and most folks, when faced with a firearm, will freeze.
I think it is clear by the evidence that there was stippling, per Investigator Gilbraith at the Bond Hearing. This is indicative of a very close range discharge. Much closer than anyone would reasonably be if they had a hand gun drawn and had a choice. I think this is clearly indicative that the engagement was not on GZ's terms. As for drawing the firearm, the Keltec is a very thin firearm.I do not know where George carried it (other than the reports that it was in his waistband). Most in-waistband carry is typically at the 5'oclock position, which is where I typically carry. If I was on my back, having my head beat as GZ alleges, I could very easily and quickly slightly shift my weight weakside, draw from concealment, and fire.
It was a good catch from another poster about the action not cycling and chambering a round. This could be a failure to cycle due to mechanical malfunction, however, the case was ejected, so likely not mechanical, as the rearward force will be unstoppable which is what pulls the case the ejector, but if there was a hand on the slide, this would possibly *advertiser censored* the cycling of the action and chambering of the next round.
Last point, while Zimmerman was involved in neighborhood watch, he was not patrolling at the time, he was going to the store. A gated community is private property, and as a property owner, GZ had every legal right to question Trayvon's presence on the private property.