Story highlights Crane was murdered in 1978

New DNA tests didn't solve the case

(CNN) The death of "Hogan's Heroes" star Bob Crane has been one of Hollywood's biggest unsolved mysteries for almost 40 years... and counting.

Phoenix Fox 10 anchor John Hook had hoped to finally crack the case after he re-investigated it and got authorities to allow him to retest DNA samples found on a suspect's car.

The big reveal came in a live segment Monday night before a panel of people that included Crane's son, the prosecutor in the case, the jury foreman and the defense attorney for John Henry Carpenter -- the man who was eventually acquitted of murder in the case.

"The DNA found on the door of John Carpenter's rental car is not, is not from Bob Crane," Hook said. "The tests actually picked up two DNA profiles. A major contributor is from a man, his identity is unknown. Second DNA profile is a partial profile too degraded to reach any conclusions."

Crane's son, Robert Crane Jr., mouthed "wow" as the results were read.