he was tailing the kid, and talking to the 911 dispatcher. dispatcher said we don't need you to follow him, zimmerman says "ok" (this is on tape) and says he turned around to walk back to his truck. TM appeared as he was walking back to his truck and confronted zimmerman and attacked him. this is what zimmermans statement was when police arrived. there is no evidence that suggests he ran up and caught the kid and started a fight with him.