Interesting. May prove something but I doubt anything could come out of it due to double jeopardy.
http://www.nbcnews.com/news/us-news/los-angeles-police-testing-knife-found-o-j-simpson-s-n531806
Los Angeles police are testing a knife found a dozen years ago on land where O.J. Simpson once lived — but it is far from clear whether it has any connection to his wife's murder, a case that has remained open since the former football star was acquitted in 1995, multiple law enforcement officials said.
http://www.nbcnews.com/news/us-news/los-angeles-police-testing-knife-found-o-j-simpson-s-n531806