Devonna Crouch, 16, killed and Cody Rupert, 18, Joe Pena, 21, and Monica Serrano, 18, injured in car accident with driver Robert Joseph Lopez Jr., 19, on Interstate 10 in Phoenix, AZ

The 19-year-old driver in a high-speed crash that killed a 16-year-old girl Friday is suspected of driving impaired and faces a possible murder charge. Robert Joseph Lopez Jr., of Glendale, was arrested Sunday. Five people, including 16-year-old Devonna Crouch, were riding in the vehicle when Lopez lost control and slammed into a freeway light pole. Crouch was killed in the impact.  A witness said the sedan crossed between lanes on the road and performed risky maneuvers, such as pulling across all the lanes of traffic, and that Lopez might have been trying to scare the people in the car. Lopez offered investigators several conflicting statements about the crash, and also admitted smoking marijuana before the crash. He was booked into the Maricopa County Jail on one count of second-degree murder, four counts of felony aggravated assault with a deadly weapon that included one resulting in physical injury, and one count of endangerment. Passengers 18-year-old Cody Rupert, 21-year-old Joe Pena and 18-year-old Monica Serrano, were also transported to area hospitals.