Sadly for GZ, there is no evidence that this happened, and plenty of evidence that he is not to be trusted.
Big examples: He has never explained WHY he was convinced TM was on drugs, he has never explained what he meant when he said there was something definately wrong with TM, he claimed Martin returned to the street from the T and circled his vehicle in a threatening manner, he claimed he was struck in the face twenty-five plus times, he claimed that Martin attacked and knocked him to the ground at the T -- something the physical evidence disputes.
I could go on, but there is no need.
A young man is dead. He was killed by George Zimmerman. George is claiming that he had no choice but to kill, and that his poor choices leading up to the conflict have no bearing on what occurred. Since no one witnessed what happened the jury will need to decide whether or not they believe Zimmerman.
If they do, they will do so despite the holes and flaws in Zimmerman's story. Either way, a young man will still be dead. His only objectively demonstrable "crime" was walking around while talking to a friend on the phone, and fitting a racial profile that GZ found suspicious. IMO