. >> reporter: ken graham was at the whiskey, a bar in the 1,800 block of west street most of the town. he was in town from california visiting friends. he was set to fly back just two days later but around 1:30 he had a small argument with his girlfriend and left the bar. he was later found dead stabbed in the upper body a couple of miles away on skipper lane. detective john lee still looks at crime scene photos to see if he's missed something. >> we have exhausted every lead and interviewed every name and every witness that we could find in conjunction with this case. we are convinced that none of the people that we've interviewed to date are responsible for the homicide. >> i'm not sure if the guy is dead or alive. >> reporter: detective lee hopes someone can recognize the voice on the 911 call. they didn't get that person's name. if they can find them maybe that could help. >> he's laying down on the -- like, on the curb. i blew my horn to try to see if he was alive and he didn't - >> there's many theories on how this may have happened. i lay in bed at night thinking theories of ho