Tammy Peterson, 14, of Rancho Cucamonga, California, was found shot to death at the north end of Etiwanda Avenue on December 22, 1978. Her death was ruled a homicide and the case quickly became an active investigation.

Investigators conducted numerous interviews, collected evidence, and issued public appeals, but no arrests have been made and no suspects have been publicly identified. The San Bernardino County Sheriff’s Department has kept the case open and has repeatedly asked anyone with information to come forward, while the case has appeared on cold case lists and in public awareness efforts.

The lack of closure has been deeply painful for Tammy’s family and the local community. Does anyone have information about Tammy or her movements in Rancho Cucamonga around December 1978?