Speck Tro Graph News Today

Prosecutors want to put expert testimony on to say they cant conclusively say, they say based on the science it is trayvon martin. defense put on a really renowned expert saying there is no credibility in these experts and the voice at all. the voice is so far away. the instruments and speck tro graph they are using is outdated. there is no way to tell with any kind of scientific certainty. >> trayvons mother said she was sure it was her sons voice. jean, we appreciate the update. lets dig deepe...