Kelly Poppleton was 14 when she was killed on December 2, 1983, in Sunol, California. Her body was found along Kilkare Road by a motorist; she had been beaten and her head was wrapped in two plastic shopping bags with a tie fashioned into a noose around her neck. She died of asphyxiation shortly after discovery.

Poppleton had been last seen at a strip mall where she was reportedly making a phone call, then vanished. Initial identification was delayed because she was found some distance from where she was last seen. A witness named Trina Bence later implicated several people, including a 13-year-old girl, a 17-year-old male, and a 27-year-old man, alleging she had been present; those accusations could not be corroborated and charges were dropped. A DNA profile was developed but has not matched any known person, and the case remains unsolved.

Anyone with information about Kelly or her movements on December 2, 1983, is asked to come forward to help bring her family closure.