(Reuters) – Nearly seventeen years after O.J. Simpson walked away from his murder trial a free man, a prosecutor at the center of the case has alleged that the lead defense lawyer tampered with a crucial piece of evidence. Former Los Angeles deputy district attorney Christopher Darden on Thursday accused Simpson defense lawyer, the late Johnnie Cochran, of "manipulating" one of the infamous gloves that the prosecution said linked Simpson to the grisly double murder of his ex-wife Nicole Brown Simpson and her friend Ronald Goldman. …