Zimmerman is a....?

Zimmerman murdered a man in cold blood. Wait not a man, a teenager. The rest is just smoke and mirrors. If you have been following the first week of the trial you will first notice that Zimmerman has gained at least 100 pounds since the night in question (doesn't seem like a person in distress over taking another life), and that he is guilty of cold blooded murder. When is the last time you heard of a person on a neighborhood watch shooting and killing someone? A first for me. Zimmerman was a man with the "itch", the "itch" to fire his weapon not at a target but at an actual human regardless of necessity. I find it hard to believe that unarmed 17 year old Trayvon Martin  was able to overpower 28 year old Zimmerman and put Zimmerman's life in danger. How did this encounter even ensue? Zimmerman saw a Black male simply walking. That's it, WALKING. So Zimmerman took it upon himself to approach the "so called perpetrator", and low and behold the young Black male ends up with a bullet in his chest. Is Zimmerman a trained police officer who has been trained to detect when people "are up to no good"? No, he saw a Black male and saw an opportunity to scratch his "itch", which he did. He initiated the confrontation, and gravely ended the confrontation. If you believe otherwise you've never held a weapon, and I hope you never do.