Kevin Gannon

The Smiley face murder theory (variations include Smiley face murders, Smiley face killings, Smiley face gang, and others) is a theory advanced by two retired New York City detectives, Kevin Gannon and Anthony Duarte, that a number of young men found dead in bodies of water across several Midwestern American states over the last decade did not accidentally drown, as concluded by law enforcement agencies, but were victims of a serial killer or killers. The term smiley face became connected to the alleged murders when it was made public that the police had discovered graffiti depicting a smiley face near locations where they think the killer dumped the bodies in at least a dozen of the cases. The response of law enforcement investigators and other experts to Gannon and Duarte's theory has been largely skeptical.