 Thirteen months before he allegedly struck 18-year-old Olivia Flores while chasing someone prosecutors say was a petty traffic violator, trooper Shane Roper tried to pull over a speeder along the same stretch of Highway 52 in Rochester. According to his disciplinary record, Roper chased the vehicle onto an exit ramp at high speed without his lights or sirens on and hit a cable barrier. He received a one-day unpaid suspension.