A construction worker found a knife buried on the perimeter of the former OJ Simpson estate ... and it's currently being tested by the LAPD in a top secret investigation ... law enforcement sources tell TMZ.
The story is incredible. We're told a construction worker found the knife years ago -- we have heard several different stories, ranging from "several years ago" to 1998, when the house was demolished.
The weapon is a folding buck knife.
Our law enforcement sources say the construction worker took the knife to the street, where he saw an LAPD cop.