It seems like a longshot any evidence can be found on a knife that had been buried for so many years, but there is a glimmer of hope according to TMZ.
We’re told if the 5″ buck knife was folded when it was buried, the blade might be sufficiently protected to net a DNA match.
The LAPD never said if the knife was folded or not, so we will just have to wait. I would still be very suspicious of any data collected by LAPD, they can’t be trusted.