By Nicholas J.C. Pistor and Leah Thorsen
St. Louis Post-Dispatch
O'Fallon, Ill. — Illinois State Police on Friday night were investigating how a state trooper lost control of his cruiser and crossed an interstate median, causing a four-car crash in which two people were killed.
At an evening press briefing, police said a witness told them that another car had cut in front of the police cruiser, causing the officer to lose control.
Two fatally injured after Ill. trooper loses control of squad car