The weapon was figured prominently in the sensational trail of O.J. Simpson.
On Friday morning, the LAPD confirmed knife was reportedly recovered in the late 1990's in the Brentwood home once owned by O.J. Simpson.
Captain Andrew Neiman says they were told a construction worker who was working on demolishing the mansion in 1998 discovered the knife. It was given it to an off-duty LAPD officer working security for a movie shoot across the street.
"I was really surprised. I would think an LAPD officer if this story is accurate as we're being told that would know that anytime you come into contact with evidence that you should submit that to investigators," said Neiman.
LAPD says the officer may have been retired. He also may have thought the case was closed after O.J.'s acquittal.
He allegedly held on to the knife secretly for decades until last month, when he contacted LAPD.
Neiman couldn't describe the knife, but says the department's elite robbery homicide division hopes to find clues on it, to perhaps put the decades old case to rest
"It's my understanding that depending on where an item is kept and how it's stored, we maintain it's possible to get DNA. Look at what we do forensically with natural history of items that are very old. So we're hopeful," said Neiman.
If they find evidence, it won't change what happens to Simpson, according to lawyer Leo Terrell.
"Nothing could happen to OJ Simpson at all. Why? Because he's already been tried, acquitted, and in this country, you cannot be tried twice. It's called double jeopardy," said Terrell.
But Terrell says the officer could potentially face time in jail
"It will be very critical to determine when this officer received evidence, if it is evidence and why did he turn it over. There could be criminal charges if this is real evidence that involved the OJ Simpson case," said Terrell.
FOX 11 reporter Hal Eisner reported on the day Nicole Brown Simpson's body was found in 1994. He got reaction from some of the key players in the case:
I can remember as if it was yesterday. Like other news reporters, I was dispatched to Brentwood for a report of a double murder.
It would soon become clear how massive this story would be. Nicole Brown Simpson and her friend Ron Goldman slashed to death. O.J. Simpson was a suspect. You know the story, but now a new chapter.
A retired police officer apparently received a knife from the Simpson Rockingham Estate found by a construction worker when the place was demolished in 1998. It’s big news! Could the murder weapon have been discovered after all of these years?
Ron Goldman’s Dad, Fred, told the New York Daily News: “I hope it turns out to be the weapon,” it would be one more nail in (Simpson’s) coffin. He should be dead already, but he’s not. Unfortunately, I don’t think it would change much legally.”
Simpson attorney F. Lee Bailey, told our Boston FOX Station, "OJ did not drop (the knife) on his property any more than he did the gloves. The whole thing is ridiculous."
Former LAPD Detective Mark Furman appeared on John Gibson’s FOX Radio Show.
He doesn’t think it's the knife, but if it were, DNA could still be on it.
“DNA could be found on dinosaur fossils,” he said.
And in New York, AP Special Correspondent Linda Deutsch told us she’s “surprised and not surprised.”
She says, in this case, “there will always be developments because it’s the greatest murder myster ever… and we’ll always be fascinated with it.”