Zimmerman didn’t confront Martin.
The transcript of the phone call shows:
Zimmerman is giving a description of Martin to dispatch. Martin sees Zimmerman and runs. Zimmerman exits the truck to pursue. He tells dispatch he’s lost Martin (which I’ve heard is confirmed by Martin who tells his girlfriend he’s lost Zimmerman).
How does Zimmerman confront Martin when he doesn’t know where Martin is?
Did Zimmerman leave the vehicle and pursue the kid, against the 911 operator and Neighborhood Watch’s recommendation? He had no business doing that. Besides that, what crime did the kid commit? Zimmerman profiled him, the kid ran (which he has every right to do), and Zimmerman pursued him. He is not the police.