Trooper shot, suspect killed in shootout during traffic stop in Hammond, Indiana

An Indiana State trooper was shot, and a suspect was killed during a shootout with officers during a traffic stop on I-80/94 in Hammond, Indiana. 

Police said just after midnight, the Lake County Sheriff's Department and the Hammond Police Department assisted Indiana State Police during a traffic stop involving a gray Hyundai Elantra,  just east of the Indiana-Illinois state line.  The cause of the traffic stop is unknown at this time. 

While conducting the stop, state police said the driver took out a gun and "an exchange of gunfire took place" between the suspect and all four officers. 

Police said the suspect was shot and died at the scene. The Lake County Coroner identified the suspect as Aaron Barnes, 34, from Gary, Indiana.

An Indiana State trooper was shot in the chest. Officials said was transferred to the University of Chicago Hospital for surgery. 

Polie said the trooper is a canine officer, and the canine was not injured. 

A 34-year-old female passenger was taken into custody.