A 23 year old Bend woman is facing multiple charges stemming from an August 17th crash that killed two. Prosecutors say toxicology reports indicate Stacia Roberts had at least three controlled substances in her blood when the accident on Highway 20 near Black Butte occurred. Two passengers in the car, Joshua Herrin, 19, died at the scene and Nina Blackmore, 18, was critically injured. She was flown to St. Charles Bend, where she died the next day. Roberts and the fourth passenger, Casey Hoyle, 20, were also taken to St. Charles for treatment and were released.  The investigation reveals the foursome had spent several hours at Cougar Hot Springs, where they drank beer and smoked marijuana.  Witnesses say they saw Roberts' car moving at erratic speeds and weaving. A published report says Roberts had traces of ecstasy, marijuana and some kind of opiate in her blood. Roberts will have to wear a tracking device, alcohol monitoring and submit to random drug testing while she awaits trial. She is released to her parents custody.