Knife Purportedly Found on OJ Property Inconsistent With Slayings: Report

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After a day of head-scratching headlines, a report has emerged that casts doubt that a knife purportedly found on Simpson's estate years ago is a murder weapon.

Multiple unnamed law enforcement officials reportedly told NBC News that the blade given to a now retired off-duty cop a dozen years ago by workers demolishing Simpson's home is inconsistent with the weapon used to kill Nicole Brown Simpson and Ron Goldman in 1994. 

What's more, the small blade doesn't appear to have been buried for a length of time that would put it in the time frame of the slayings, NBC reported.

Read: From the Gloves to the Bloodied Clothes, What Happened to Evidence in O.J. Simpson's Trial?

Nonetheless, the explosive first update to a now over twenty year old case rocked America on Friday after LAPD officials said they are testing the knife to determine if, in fact, it was used in the grisly crimes.

Simpson owned the Los Angeles mansion during the time his ex-wife and her friend were stabbed to death. Simpson was acquitted of the killings.

The knife was turned over to the police last month by a retired officer, according to Captain Andrew Neiman, who spoke at a press conference on Friday morning.

The officer was given the knife by a construction worker who found the knife on Simpson’s Rockingham Estate while the property was demolished, Neiman said.

It is not known where on the property the knife was found.

Read: Investigation Launched After Knife Found on O.J. Simpson's Property

According to Neiman, the Robbery Homicide Division did not want the name of the retired officer nor describe the type of knife that was found released to the public as they continue their investigation.

Neiman also said that the LAPD are looking into administrative charges against the retired officer as well as criminal charges.

The captain stressed that the officer was off-duty. He said they are investigating whether he had retired from the force at the time the weapon was given to him. The officer is said to have retired from the LAPD in “the late 90s” according to Neiman.

According to Neiman, the retired officer thought the case was closed, however, since no killer has never been convicted in the murders of Brown Simpson and Goldman, the case has remained open for 22 years.

Watch: Khloe Kardashian: People Scrawled 'Guilty' On My Dad's Car During O.J. Trial