The Zodiac Killer: America's Most Elusive Serial Predator
Unidentified serial killer terrorized Northern California, 1968-1969. Sent cryptic ciphers to newspapers, claimed 37 victims, never caught.
Subject remains unidentified after comprehensive multi-jurisdictional investigation spanning five decades. Known victims confirmed through ballistics, handwriting analysis, and survivor testimony. Suspect demonstrated advanced knowledge of police procedures and cryptography. Multiple law enforcement agencies including SFPD, Napa County Sheriff, Vallejo PD, and FBI have pursued over 2,500 potential suspects without definitive identification. Case files remain open with evidence preserved for future forensic advances including DNA analysis.
- Arthur Leigh Allen Theory
- Military/Intelligence Background
- Multiple Perpetrators Theory
- Gary Francis Poste Theory
- Unabomber Connection Theory
- Copycat Letter Theory
- Local Knowledge Theory
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