Lindsey R. Chronister, 18, of Alton was driving a 2008 Yamaha Grizzly ATV on County Road 127 on June 2 about five miles east of Alton when she lost control of the ATV, ran off a steep grade and struck a tree. Chronister was not wearing a helmet or any other type of safety device, according to the crash report. Oregon County EMS transported Chronister to Ozark's Medical Center in West Plains, from there she was transported to a Springfield hospital. According to the crash report, Chronister suffered serious injuries in the accident. The investigating trooper was J.C. Howell.