Johnny Depp's next role might be as a witness in a murder trial. The 50-year-old actor was reportedly served with legal papers at the Hollywood premiere of his latest film Transcendence on Thursday, according to TMZ. Nancy Lekon, a Los Angeles limo driver charged with the 2009 murder of a pedestrian, has pleaded not guilty by reason of insanity. Lekon told police at the time that she was dating Depp. Her defense attorneys have called on the actor to beef up their insanity case by stating that he does not know the woman. From: UPI