the time of the murders, to show that simpson was alone and unaccounted for for at least an hour. enough time to kill ron and nicole. >> kato kaelin took the stand to testify about that night he was with simpson. but first, came one of those kato moments. >> did you think your friendship with him, your acquaintanceship, living on his property might send acting roles your way? >> i didn't think that. i didn't think we were going for the same parts. i was just being me. it wasn't about the spotlight. it was just how i am. >> but kaelin was serious when he detailed the sequence of events before and after the murders from the trip the two took to mcdonald's. to those three strange sounds he heard at 10:35 p.m., sounds investigators believe were those of simpson returning home after killing ron and nicole. >> can you demonstrate for us how loud it was? >> somewhat, yes. >> go ahead.