Zodiac Killer's Identity Could be Revealed

He terrorized the San Francisco bay area and taunted police in the 60's and 70's.

The FBI has now confirmed to CBS13 in Sacramento they are running laboratory tests on some items that may link a suspect to the Zodiac Killer.

The evidence was given to the FBI by a Sacramento area man who also claims he recently found a disguise worn by the Zodiac Killer.

> RELATED -- APRIL 2009: Woman Claims Her Dad Was Zodiac Killer <

This is a man who believes he has a very personal connection to the zodiac...as

"The identity of the zodiac killer is Jack Torrance. He's my step father" said Dennis Kaufman. "Am I obsessed? No, obligated."

Kaufman spent eight years attempting to prove the only father he's known since he was five years old is the Zodiac Killer.

His Handwriting samples are similar.

The composite sketch of the killer shares similarities with his step father's photo.

Kaufman believes the similarities are to strong to be coincidence.

Dennis also claims his step-father, in a taped phone conversation indirectly admitted being the Zodiac Killer.

"If I wrote a book and said I think my step father is the Zodiac Killer they wouldn't (expletive deleted) believe me," said Kaufman.

Tarrance died in 2006.

Kaufman claims going through his dead step fathers belonging that there were disturbing finds including a knife still covered with what could possibly be dried blood.

"It could be a knife he BBQ'd with or a knife he murdered someone with," said Kaufman.

Tarrance also left behind rolls of undeveloped film, Kaufman plans to hand over to the FBI.

The roll Kaufman did develop on his own appeared to show the images of people who were murdered.

Recently Kaufman remembered his step father asked him several times about an old P.A. 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," said Kaufman.

The material folded and tucked inside he believes may unmask the Zodiac Killer. It was a black hood with a zodiac symbol on it.

In Lake Berryessa, 1968, a couple, Cecelia Shepard and Bryan Hartnell were stabbed.

Hartnell survived and said his attacker was wearing a black hood that fell to his waist and had the symbol of the zodiac on it.

"I was definitely in shock when i saw this," said Kaufman.

Dennis claims this is the hood worn during the vicious attack, a possible key piece of evidence connecting his step father to the killings.

He also believes there are dozens more victims, never linked to the Zodiac Killer.

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," Kaufman said.