Dennis became convinced that Jack Tarrance is the Zodiac.

his stepson,

publicly stated that he has proof that Larry Kane is the Zodiac killer and has spent years building a case against Kane.

e was reportedly diagnosed with a mental disorder in which he was "losing control of his self-gratification."

Navy;

Navy;

not a lot of evidence that supports the theories

Former Manson Family Member

convicted killer

Allen spent a lot of time alone, driving in nearby rural areas -- such as Lake Herman Road

Throughout the past four decades, police have investigated the murder cases and the extensive collection of communications from the self-named Zodiac. But 2,500 suspects later, the Zodiac's identity remains an intriguing mystery.

About a month after the murder, typewritten confession letters were mailed to a local paper and to police.

Royal typewriter with Elite type from the home of Arthur Leigh Allen.

US Air Force; Navy;

Navy;

Navy;

Navy;

Navy;

Navy;

Kane can only be linked to one of Zodiac's confirmed victims -- Darlene Ferrin.