he backed away and we heard the detective -- what he said was under his breathe tracy martin mumbled something and that hi interpreted what tracy martin said as a no. the fact that he said he interpreted made it clear it was somewhat not clear but also, serrino said singleton was not there. so there is issues there in terms of what he said, but most importantly, though, we must remember he heard a series of 911 calls and at the end this gun shot. that was the final thing that took his son's life. in terms of whose voice it was, that wasn't the focus. the focus was on the gunshot and that gunshot is the climax of that tape, not the voice that you hear. >> mark o'mara says he's convinced the state has not proved their case beyond a reasonable doubt of second-degree murder. are you convinced the state has proved second-degree murder beyond a reasonable doubt? >> i think they either have it or very close and i think that's why the law allows the lesser included offenses, so at this point, all we want is justice