The 23 year old woman responsible for the car accident last August on Highway 20 near Black Butte Ranch that killed two teens learns her sentence. Stacia Roberts will spend six years in prison for the fatal car accident that resulted in the deaths of two of her friends. Our news partner, News Channel 21 was in the courtroom Monday when Roberts pleaded guilty to two counts of second-degree manslaughter, and driving under the influence. “I'm going to do the time that I need to do, because Josh and Nina aren't here anymore and I just feel awful about the whole situation.” Josh Herrin, 19, and Nina Blackmore, 18, were riding in the backseat of Roberts’ car last August and were killed in the crash. Drug tests revealed traces of ecstasy, marijuana and other opiates in her system the night of the accident.