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Case Description
Any updates on this case?
Mark John Dreibelbis, a 15-year-old boy from Santa Cruz, California, tragically lost his life on February 10, 1973. His death was part of a horrific event orchestrated by Herbert Mullin, a notorious serial killer active in the early 1970s. Mullin, who was suffering from severe mental illness exacerbated by drug use, believed that his actions were necessary to prevent catastrophic earthquakes. On the day of the incident, Mullin encountered Mark and three other teenage boys—Robert Michael Specto ...Read More
Links to Additional Sources (6)
See any mistakes?Victim Details
Mark John Dreibelbis
Male
Santa-cruz
CA
1973-02-10
15
Mark
John Dreibelbis
11/09/2025
Forum Posts (3)
I can’t stop thinking about the BSA hat found at the scene. It just conjures such a vivid image of... ...Read More
11/23/2024
11/23/2024
I recently read about the tragic events surrounding Mark John Dreibelbis's death, and one aspect tha... ...Read More
11/08/2023
11/08/2023
I’ve been digging into the details of the Herbert Mullin case and just came across the story of Ma... ...Read More
01/21/2023
01/21/2023
