It’s been thirty-eight years since Bob Crane was found bludgeoned to death in his Scottsdale, Arizona, home, but the unsolved case remains a bigger mystery than ever.
Bob Crane, who famously starred as Colonel Robert E. Hogan in ’60s WWII sitcom Hogan’s Heroes, was killed in 1978, and his friend, video salesman John Carpenter, was eventually tried and acquitted in his death.
Fox 10 Phoenix reporter John Hook retested DNA samples found on Carpenter’s car using new technology as part of an investigation into the murder, assisted by local law enforcement.
Revealing the results on Monday in front of a panel that included the case prosecutor, Carpenter’s defense attorney and Crane’s son, Bob Crane, Jr., Hook said that “the DNA found on the door of John Carpenter’s rental car is not… from Bob Crane,” reported Fox News.
“The tests actually picked up two DNA profiles,” Hook said. “A major contributor is from a man, his identity is unknown. [The] second DNA profile is a partial profile too degraded to reach any conclusions.”
Crane, Jr., was surprised by the news — which further cleared Carpenter and added more mystery to the case. “I’m shocked right now,” he said during the live reveal.
• Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.
Carpenter and Crane’s friendship “revolved around electronics and women,” Crane, Jr., said, according to CNN, Crane’s habit of videotaping and photographing sexual encounters came to light publicly after the murder and his relationship to Carpenter was revealed.
Following a trial in 1994, Carpenter was acquitted in the killing. He died four years later, in 1998.
“This is wonderful news for his family,” Carpenter’s attorney Steve Avilla said on the show of the DNA results. “This is wonderful news for John who has passed away to know that he has finally been vindicated, not only in a court of law but in a court of public opinion.”
Avilla did not immediately respond to PEOPLE’s request for further comment.