Two prosecution audio experts in testimony Thursday and Friday qualified their findings, saying the quality of the recording was poor. One acoustics consultant, Alan Reich tentatively identified Martin's voice, including what he said was a final "stop" yelled by Martin just before the gunshot.
"The words at scream level were almost entirely Trayvon Martin," Reich testified on Friday.
Another forensic audio expert, Thomas Owens, tentatively ruled out Zimmerman based on a comparison of the screams to known samples of Zimmerman's voice.
"The screams don't match at all. That is what tells me it's not George Zimmerman," Owen testified Friday.