If you listen to it in a loop (which I have linked to) you can make out he is saying "F****g Punks!"
HERE IS A SLOWED DOWN, ENHANCED LOOP OF ZIMMERMAN
It CLEARLY isn't "coons", the word is a puckered "P".
No mistaking it.
Sounds right to me.
That a Hispanic man who tutors black children, observing someone who seems to be casing houses for a possible burglary, and not sure what race the person is, would use an out-of-date slur revealing animus against blacks (when he might know his call is being recorded), is totally implausible.
But the media and the activists immediately constructed the most damning picture they could of the shooter, and for many people that will always be the reality.
It looks like Trayvon tried to kill Zimmerman. He failed, but now his supporters (who never knew him while he was alive) are out to kill Zimmerman to avenge his death. If Zimmerman survives the next few months it may be only by staying hidden all the time. For longer-term survival he may need to alter his appearance and acquire a new identity...maybe move to another country. He might be better off going to his mother's country.