Serial killer targets young college men?

The stories are the same all over the country--an athletic, intelligent, well-liked college student goes missing.Family and friends launch a massive search. Weeks or months later, the young man is discovered drowned. In more than 40 cases, the deaths are blamed on a drunken accident--except for one.

The death of Chris Jenkins in Minneapolis is the only one where the cause of death was changed from 'undetermined' or 'drowning' to 'homicide.'

The two detectives from New York, Gannon and Duarte, have done something that no other law enforcement agency has ever done in this case -- they looked at the big picture and visited each site where the young men disappeared. While most local investigations focused on where a body was recovered, Gannon and Duarte tried to figure out where the body went into the river.

City after city, when they'd find the spot where the body went into the water, they would find something else: The symbol of a smiley face. "It's very disturbing," Duarte said.The paint color and size of the face varies, but the detectives are convinced that it's a sick signature the killers leave behind.