In another twist in the long-running O.J. Simpson saga, Los Angeles police are investigating and testing a knife that was reportedly recovered on the Brentwood property once owned by the former football star, reports the Los Angeles Times.

The elite Robbery-Homicide Division is investigating a knife now in the possession of the Los Angeles Police Department.

The knife was apparently turned over to a police officer a number of years ago by a construction worker who was helping to raze Simpson's mansion on Rockingham Avenue, police said.

At a news conference at LAPD headquarters Friday morning, Capt. Andy Neiman said the officer was a traffic cop and was working on a movie set when he was given the knife.

Detectives learned of the knife's existence last month, and are now investigating where it came from, according to Neiman, who cautioned that the investigation is still in its early stages.

Neiman told reporters it was unclear why the officer waited nearly two decades to hand over the knife.

"I don’t know why that didn’t happen or if that’s entirely accurate or if this whole story is possibly bogus from the get-go," he said.