This two-episode documentary series aligns with one popular theory, that there were multiple killers, and uses witness testimony and modern forensic technology to go about proving it.
Theories around the identity of the Zodiac Killer have persisted since the late-'60s, and everyone from detectives at the time to amateur sleuths decades later have tried to uncover the mystery. This two-episode documentary series aligns with one popular theory, that there were multiple killers, and uses witness testimony and modern forensic technology to go about proving it.