 Matt Sepet reports. 18-year-old Olivia Flores of Owatonna was killed in May when trooper Shane Roper allegedly T-boned the Ford sedan she was in and pushed it into an SUV near the Apache Mall. Five others were hurt. Roper faces manslaughter, criminal vehicular homicide, and other charges. Olmstead County Attorney Mark Ostrom says Roper was conducting traffic enforcement along Highway 52 when he exited a ramp at high speed to try to catch, quote, a petty traffic violator.