I wasn't really following the story much, just catching the headlines. But what I read in the report above differs completely from the media story, and that is the point - the story the media chooses to sell to us, as we all should be a little more sensitive to than many others.
The media is portraying him as what looks likes an innocent 14 year old, when he was possibly according to this story a trouble-making gang member with a "No Limit" attitude who may have just recently swung at a bus drive, and was confronted by some guy in a neighborhood he wasn't from. They were likely both in the wrong at some point during the confrontation, and Zimmerman probably shouldn't have followed him and maybe should have left it to the police since they were on they way (where ironically this kid's chances of getting beaten or shot would have been likely higher, unfortunately). I don't know if this Zimmerman's life was in danger when he felt he had to pull the trigger, or not. I don't yet know who started the confrontation, and who was doing what to whom when the trigger was pulled. But the 6'3" young man described in this article is a different picture than the one being portrayed by the media, and everyone has already jumped to their conclusions based upon it.
And no, his pot use, tattoos, and his investment in precious metals to cover his teeth have nothing to do with it.