This could be interesting Knife reportedly found on former O.J. Simpson property is being tested by LAPD - LA Times
It won't mean much, even if the victims' DNA are found on it. The jury rejected a whole lot of DNA evidence at trial, enough to convict anyone not a huge celebrity. They either didn't understand it, chose not to believe in it, or decided it was a set-up. (No one who believed it was a set-up has ever really explained WHY the cops would try to set-up one of the most famous Americans on the planet (at the time).)