NEW BRUNSWICK, NJ - JUNE 11:  Kevin Roper sits during his court appearance at Middlesex County Courthouse on June 11, 2014 in New Brunswick, New Jersey. Roper pleaded not guilty to charges of death by auto and assault by auto.  Roper is the Walmart truck driver accused of causing the accident that critically injured comedian Tracy Morgan on Saturday, June 7.  (Photo by Bobby Bank/Getty Images)