Chicago cop murdered during traffic stop

There's bad news on this Election Day morning. A Chicago cop was murdered.

From Fox Chicago:

The shooting happened during a traffic stop around 8 p.m. in the 8000 block of South Ingleside Avenue, according to Chicago police. 

Someone inside the vehicle started shooting as police approached, striking one officer and another occupant of the vehicle. Police said at least one officer returned fire. The suspect tried to drive away and struck another officer at the scene. The driver then tried to run away from the car but was arrested in the 8000 block of South Maryland Avenue, police said. 

The officer who was shot was taken to the University of Chicago Hospital where he was pronounced dead.

The Fraternal Order of Police identified him Tuesday morning as 26-year-old Officer Enrique Martinez.