A new enhanced version of the 911 call made by George Zimmerman before he killed Trayvon Martin, has raised further questions about where or not he uttered a racial slur before shooting the black teen. In a call to dispatchers, neighborhood watch captain Zimmerman can be heard muttering what sounds like ‘f***ing c**ns’ under his breath as he followed 17-year-old shooting Martin. But now CNN has enhanced the audio further and concluded that the 28-year-old may have actually said ‘f***ing cold’ on the rainy night of the killing in February. In an earlier enhancement last month, CNN’s Gary Tuckman said he believed Zimmerman had made the racial slur and said: ‘It certainly sounds like that word to me.’  However, having had the call enhanced further by an audio expert, he is not so sure. ‘Now it does sound less like that racial slur. … From listening in this room, and this is a state-of-the-art room, it doesn’t sound like that slur anymore. ‘It sounds like … we‘re hearing the swear word at first and then the word ’cold.’ And the reason some say that would be relevant, is because it was unseasonably cold in Florida that night and raining.’ The audio expert agreed it could be the word ‘cold’ and said the new method gets rid of a lot more background noise without changing the voice or words. Zimmerman told his lawyers that he had whispered ‘punks’ not a racial slur, during the call.