Supposedly Trayvon’s father say it isn’t Trayvon’s voice. I haven’t seen the article that quotes him but I’m sure some FReeper can find it and post it here.
I saw the same thing.
Early on, before the race hustlers descended on this case, the police asked Trayvon's father if he recognized the voice screaming for help, on the recording of the neighbor's 911 call, as Trayvon's. The father's answer was no, it was not Trayvon's voice.
Clearly this was a boo-boo from the race-hustlers' point of view. Trayvon's mother had to be trotted out to "correct" the story by contradicting the earlier statement (much as she had to "correct" her "it was an accident" admission).
I hope somebody preserved those news articles here on FR. If not, they might have disappeared down the Orwellian memory hole.