vietnam wants to come before people that break down with it, but i think that his testimony was quite credible when he believed it was mr. zimmerman. doris singleton and, by the way, chris serino both say the same thing. unfortunately, when mr. martin did first hear the tape, he said what he believed to be true then, it would seem, from the officers. and that is that's not my son's voice. it just wasn't his voice to him. and his mind has changed now. but it is interesting for you to consider when you're trying to figure out that issue of who said what and what witnesses said what. because you're going to give them credibility, you're going to weigh them, you're going to decide to dismiss their testimony or to accept their testimony and figure out -- remember always awz we'll talk about in a moment, where the