When I first heard about the case, and listened to George Zimmerman’s statements to police and the media, he said that his gun holster became visible because his shirt got pulled up, Trayvon saw it and said, “you’re dead now, m————r”, and reached for it. George then pulled it out of the holster and fired.
This is my best memory. I’d have to go search to find the sources. Tell me if you think I’m wrong.
I seem to remember something quite similar myself.