Tommy Winn is a Triad drug lord in San Francisco and a cold-blooded killer. He was seen by Adrian Monk when he shot someone death in an alleyway. He saw Monk look in his direction and upon hearing police sirens, he fled. His gang members tracked down Monk in the Sierra Nevada Mountain region courtesy of Randy Disher who unknowingly led them there but were killed in the gunfight. Monk survived but it is unclear of what happened to Winn.