FILE - In this May 13, 2013, file photo, O.J. Simpson appears at an evidentiary hearing in Clark County District Court, in Las Vegas. Los Angeles police are investigating a knife purportedly found some time ago at the former home of Simpson, who was acquitted of murder charges in the 1994 stabbing deaths of his ex-wife Nicole Brown Simpson and her friend Ron Goldman. (AP Photo/Julie Jacobson, Pool, File)