In 1974, 19-year-old Arlis Perry was brutally murdered inside Stanford University’s Memorial Church. Her body was discovered posed in a ritualistic manner, surrounded by religious objects—fueling decades of rumors about satanic cults and ritual sacrifice. Despite the collection of physical evidence, the case would remain unsolved for over 40 years.

Arlis’s murder became one of Northern California’s most haunting cold cases. But behind the layers of myth and speculation, forensic science quietly held the answers. Decades later, advancements in DNA and fingerprint analysis would expose the killer—someone who had been involved in the case from the very beginning.