If that head wound is the result of Trayvon beating on Zimmerman I would say Zimmerman shot at the last possible second. Sounds to me like he just wanted to have a few words with Trayvon and then Trayvon decided to show Zimmerman the curb and that's when things got out of control. Maybe Zimmerman did provoke it somehow and when he saw Trayvon was about to kill him with possibly even his own weapon it was kill or be killed. Trayvon is the one who looks like the Shady character in this situation. The race card was being played out before this incident even started, it wasn't a factor it was an excuse.