Who Was the Zodiac Killer
The Zodiac Killer was an unidentified serial killer who committed multiple murders in Northern California in the late 1960s and early 1970s. The case gained widespread attention because of taunting letters, ciphers, and threats sent to newspapers and police.
Why the Zodiac Killer Was Never Caught
Investigators faced several obstacles, including limited forensic technology, destroyed or lost evidence, and unclear witness descriptions. The killer used multiple aliases and changed attack locations, making it difficult to connect all crimes to a single suspect.
What Helped Keep the Case Unsolved
Several factors contributed to the lack of an arrest, including incomplete fingerprints, ambiguous DNA evidence, and the killer's careful avoidance of leaving clear identifiers. Public tips often led to dead ends, and the case was never definitively closed.
For an overview of the investigation and remaining questions, see the FBI's case summary at FBI Famous Cases: Zodiac.
