He said the Caliber also had been totaled and that the driver had been ejected from the vehicle. He said it was clear she had died at the scene.
"A lady that had been behind me (when I pulled over) knew CPR and ran over to the car. She ended up coming back in tears," Leonhardt said.
He said he returned to check on his daughter when they could not free O'Boyle. He said police and emergency personnel arrived about 10 minutes after he stopped his vehicle. He said he ended up leaving the scene at that time to make room for emergency vehicles.
"It was very shocking," Leonhardt said. "But everyone at the scene did everything they could to help."
No alcohol was detected and all vehicle occupants were using seatbelts, except Lindi Paul.
Five people have died on Minnesota roads since Friday, including Monday morning's fatal crash near Winthrop. A total of 58 people have died on Minnesota roads since Jan. 1, the patrol said. The total is six more crashes than this time in 2013, but the total is less than this time in 2012.