Amateurs Crack Zodiac's 51-Year-Old Z340 Cipher After Police Fail

The Z340 cipher remained unsolved for 51 years until amateur codebreakers cracked it in 2020 after professional cryptographers and police failed. This forensic documentary investigates how the Zodiac Killer case shows forensic failures in criminal investigation. True crime deep dive into cold case evidence and why crime scene analysis couldn't decode the message. Watch the complete unsolved mystery investigation: https://www.youtube.com/watch?v=NUC4U_hnJP0 #zodiac #truecrimedocumentary #coldcase #forensics #unsolvedcase