A Minnesota state trooper with a spotty driving record was charged with manslaughter and vehicular homicide Tuesday in a high-speed crash that killed a high school cheerleader weeks before she was set to graduate. Witnesses said Shane Roper, 32, was allegedly “hauling ass” and “flying” in a patrol car without its emergency lights or siren activated when it T-boned a Ford Focus making a left turn near the Apache Mall in Rochester around 5:40 p.m. on May 18. One or both cars then struck a Toyota RAV4 SUV, leaving all five people in the civilian vehicles seriously injured. Olivia Flores, 18, of O…