kenny elliott: he said that they were there watching movies. and she left his house around 4:30 in the morning. and what time did you think that she was killed? kenny elliott: we got the call, i think, at 7:15 am. so between 4:30 am and 7:00. andrea canning: the male friend, a college student, was the last known person to see jamie alive. the detective paid him a visit. kenny elliott: he was upset, obviously. they were friends and had been for some time. andrea canning: the friend's grief seemed genuine, but something was peculiar. when investigators asked for a dna sample-- he said no. no? of course, we wanted to know why. was he the killer, or was he not? andrea canning: the detective was determined to answer that question. so he put the young man under surveillance, followed him to a local restaurant. and are you hidden somewhere in the restaurant? i'm kind of back in a corner, yeah. andrea canning: he watched the student have a few drinks. and when he left, the detective snagged the dirty beer mugs and sent them out for dna testing. the res