Deaths of 40 male college students have been ruled `` accidental drowning '' and the cause is still under investigation. At least 12 creepy smiley faces found where bodies were put in rivers , lakes . The detectives believe that the smiley faces were left by the killer or killers . FBI : No evidence linking tragic deaths or substantiating serial killer theory .
Deaths of 40 male college students have been ruled `` accidental drowning '' and the cause is still under investigation. At least 12 creepy smiley faces found where bodies were put in rivers , lakes . FBI : No evidence linking tragic deaths or substantiating serial killer theory .