Los Angeles Police Capt. Andy Neiman announced in March that a knife possibly linked to the murder of O.J. Simpson's ex-wife was undergoing forensic tests. Those tests have determined that it was not involved in the crime. Nick Ut/AP hide caption

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Sarah Paulson plays prosecutor Marcia Clark and Sterling K. Brown plays fellow prosecutor Christopher Darden in the FX series The People v. O.J. Simpson: American Crime Story. Ray Mickshaw/FX hide caption

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Sarah Paulson Strives To 'Get It Right' As O.J. Simpson Prosecutor
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O.J. Simpson, flanked by defense attorneys F. Lee Bailey (left) and Johnnie Cochran Jr., reacts as he is found not guilty on Oct. 3, 1995, of murdering his ex-wife Nicole Brown Simpson and her friend Ron Goldman. Myung J. Chun/AP hide caption

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O.J. Simpson stands at the end of a May 17 hearing in Clark County District Court in Las Vegas. A judge on Tuesday said Simpson is not entitled to a new trial on his 2008 convictions for armed robbery and kidnapping. Getty Images hide caption

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