Chicago police say they were questioning Ristau in a drug investigation when he struck an officer with his car. He then took off and led officers on a chase on the Eisenhower. They say the driver suddenly did a U-turn and crashed into a police truck.
Ristau then reportedly drove toward another officer. And police fired on the car.
Fifty-three-year-old Thomas Hogueisson is also charged with possession of heroin.
