Unsolved homicides due lack of direct evidence. Only suspect(s) investigators connected by weak circumstantial evidence.
Like any Mystery it has many theories and researchers trying to solve the case. Several Movies, documentaries and books about the Zodiac killer.
https://www.history.com/news/the-zodiac-killer-a-timeline
Zodiac killer sent cryptic messages to authorities and did a interview. Recently a armature broke the code and the messages translated.
https://sanfrancisco.cbslocal.…ved-amateur-codebreakers/
A real True Crime story people find interesting. I just watched the movie and found out the places the murders took place are only a few miles away.
