If that's all the evidence there was I would agree with you. But when they have screenshots of him seeking out directions to make LEAN ("coincidentally" using 2 out of the 3 EXACT SAME INGREDIENTS that he was found with) and his liver showed signs of damage consistent with LEAN usage, that's some pretty damning circumstantial evidence.Sure, let's continue to demonize the kid who was minding his own business walking home and got killed for it, and praise the wannabe cop who arms himself and follows people who are minding their own business. Again with the Skittles and Arizona. No Robitussin? Well, they say 2 out of 3 ain't bad, but in this case, 2 out of 3 ain't LEAN.
That said, even if he was making LEAN, that doesn't justify shooting him if he wasn't trying to kill Zimmerman. But it does submarine the "sweet young man" image the media and family were trying to portray.