>> the jury laughed. that's the first trial i've ever been on where i heard jury members snicker. >> reporter: but the crawleys, who were in court when those tapes were played, were not laughing. they say they'd heard many of those calls firsthand and believed they were the real thing. the jury had heard jermeir testify. he has a deep voice. and the person on the tapes doesn't have a deep voice. >> doesn't have, exactly. he disguised his voice. >> reporter: you think he can disguise his voice that well? >> yeah. >> apparently, he can. >> well, he did it. he did it. >> reporter: you're convinced that was jermeir. >> oh, it was jermeir. >> reporter: so whose voice would ultimately ring true? a three-year investigation was now in the hands of 12 people. two families now waited anxiously inside the durham county courthouse. as did assistant d.a. david saacks. >> i'm never confident when a case goes to the jury. >> reporter: you've been slapped in the face by juries before. >> too many times. that's the lesson here, you never know.