The driver of a semi that was involved in a fatal crash on I-44 near Rolla has been charged with involuntary manslaughter.
The Phelps County prosecuting attorney says Tyler Lewis Davis, 33, of Troy, Missouri has also been charged with four counts of second-degree assault.
The Highway Patrol says Davis rear-ended a car with his semi on I-44 at the 192 mile marker Monday, killing Jan Fenton, 55, of Maryville, Illinois.
Fenton's car then hit the rear of an SUV then ran off the road. She died at the scene and a passenger in her car was seriously injured.
A fourth car was hit when the SUV flipped over. Two people in the SUV were injured.
Davis, the driver of the semi, had minor injuries.