What if Zimmerman had not done what he did and the black guy acting suspiciously broke into a house and killed someone? Zimmerman was trying to keep Martin in sight until the cops got there. I’m sure if he had it to do over, he’d let Martin do whatever the hell he wanted to do.
There is no evidence that Trayvon Martin was doing anything illegal, despite his somewhat checkered youth. (Well, he did nothing illegal until he attacked Zimmerman). My point is: if you have a concealed weapon, you would be wise to exercise extreme caution and to be aware of your surroundings at all times. Getting out of your car while watching/following a suspicious person is not being cautious.