CNNW Anderson Cooper 360 April 6, 2012
of the puzzle so you can decide for yourself based on the evidence what happened that night. today a leegd forensic audio expert listened to george zimmerman's 911 call and weighed in on whether zimmerman uttered a racial slur when he got out of his suv to follow martin i.'s only 1.6 seconds of audio. but it's important because the federal government is investigating this as a possible hate crime. the audio could be a major piece of evidence. the fbi is certainly treating it that way doing their own analysis of the tape. before we go further, a warning about the language. if you want...