tiny apartment, and then smothered her, shocked her with a taser, drowned her in the bathtub and dumped her body out on wadmalaw island because he thought no one would ever find her there. so did you think you convinced that jury? i thought that the trial went better than i ever could have hoped. reporter: except that is for two things, one, would the jury believe ethan actually killed his best friend kate? and two heather kamp is a liar. heather kamp is jealous of kate. heather kamp is the one stealing. reporter: but heather s testimony did seem to terrify one person, ethan mack himself, and it showed. when he was in the courtroom waiting for the jury too com co back, we have that picture, what was happening with your client? at that point, you know, true