The FBI confirmed to CBS13 on Thursday that they are now running laboratory tests on some items that may link a suspect to the killer.
The evidence was given to the FBI by a Pollock Pines man who also claims he recently found the disguise worn by the Zodiac Killer during one of his attacks.
"The identity of the Zodiac Killer is Jack Tarrance. He's my stepfather," said Dennis Kaufman.
Eight years of Dennis Kaufman's life has been consumed with attempting to prove the only father he's known since he was five-years-old is none other than the Zodiac Killer.
During the quest to prove his stepfather’s guilt, Kaufman found several pieces of intriguing evidence, including handwriting comparisons, phone taps, a knife, and the famous Zodiac Hood.
Just recently, Kaufman remembered his stepfather asking him several times about an old PA system, which led him to take it apart.
"When I first opened it up that did affect me. My heart skipped a couple of beats when I saw it," he said.
The material folded and tucked inside, Kaufman believes, may unmask the zodiac killer.
"It was a black hood with a zodiac on it," Kaufman said.
It's similar to the hood worn during the vicious 1968 Lake Berryessa attack, which could be key evidence connecting his stepfather to the killings. He also believes there are dozens of additional victims which were never linked to the Zodiac, including Kaufman's own mother, who he claims was suffocated.
"She sat there and told me Jack was trying to kill her and I didn't listen. I can only imagine how she felt. Imagine how scary that would be. That is what kept me going this whole time," he said.
The FBI confirmed they are running DNA tests on items that Kaufman gave them.
One can only hope that this new evidence could bring closure to the mystery. If the evidence pans out and proves in fact that Jack Tarrance is the Zodiac, it would be a bittersweet victory of some sort… Jack Tarrance died in 2006.