Doodler

The Doodler, also known as the Black Doodler, is an unidentified serial killer believed responsible for 14 slayings and three assaults of men in the gay community of San Francisco, California between January 1974 and September 1975. The nickname was given due to the perpetrator's habit of sketching his victims prior to their sexual encounters and murders by stabbing. The perpetrator met his victims at gay nightclubs, bars and restaurants.