New evidence suggests the taunting menace of the ZODIAC KILLER may still be at large!

A new bombshell book claims to have evidence that will finally solve the 44-year-old Northern California thrill kill case.

Written by former California Highway Patrol officer, Lyndon Lafferty, The Zodiac Killer Cover Up proposes the theory that the serial killer who claimed seven – five dead and two injured – victims between December 1968 and October 1969 is now a 91-year-old man living in Solano County, California.

Instead of naming his culprit, Lafferty uses aliases and reveals that he and other law enforcement officers and government officials (known as the Mandamus Seven) have known the identity of the suspect since March 1971 but were kept quiet by "power brokers" in the opulent neighborhood.

Many of the victims targeted were couples in popular make-out spots who were gunned down or stabbed by a man whom one survivor described as wearing a black executioner's-type hood with clip-on sunglasses over the eye-holes wearing a bib-like device on his chest that had a white cross-circle symbol on it.

“I know what most people think of Zodiac theories, and there have been so many over the years that if a person walked into the Vallejo Police Department right now and said he was the Zodiac, they'd tell him to get out," Lafferty told the San Francisco Chronicle in an interview last year.

"But I do feel that we have a very credible  case,” said the ex-cop, who claims the killer was motivated by jealousy because his wife was having an affair and he was driven to blood-lusting vengeance.

 The crazed shooter taunted the Bay Area police with cryptic letters including a 408-symbol cryptogram which he claimed contained his identity that was sent to The SF Chronicle.

"The police shall never catch me, because I have been too clever for them," Zodiac wrote in a letter.

 "I enjoy needling the blue pigs," he boasted.