Punks was said at a completly different time of the tape. There were two comments in question. In the first after he gets out of the truck he said “Fn Cold”/NOT Fn Coons as the media first said.
Later he said “the punks always get away.”
George Zimmerman 911 call about Trayvon Martin UnRedacted
The first thing along those lines that he says is "These assholes they always get away" and he is speaking directly to the dispatcher at about 1:41 in the recording. George gets out of his truck at about 2:10. The dispatcher asks "which entrance" and George says to himself "these 'effing' punks" at 2:23. It is after that that the dispatcher asks if he is following Trayvon. See for yourself.