Minnesota State Patrol

It happened near St. Charles.

All four vehicles were traveling in the same direction.

He was taken to St. Mary's Hospital.

The State Patrol says her vehicle hit a guardrail.

The state crash report says snow and ice were on the road.

Two passing motorists stopped the assault after the trooper yelled for help.

Authorities say the vehicle left the roadway and rolled down an embankment.

The trooper spotted the vehicle traveling at a high rate of speed.

Two of the incidents were crashes that happened Friday and the third fatality involved a pedestrian Saturday night.

She died at the scene.