The Brief Four teens killed after their truck crashed into a train box car early Sunday have been identified. Police said the driver fled from a traffic stop before the truck left the road and struck the train car. The Cook County Medical Examiner's Office has identified the four teenagers killed after a truck speeding away from police crashed into a train box car on Chicago's Southwest Side early Sunday. Teens identified in deadly Chicago crashThe backstory:According to Chicago police, the incident began when someone reported that an unidentified person pointed a gun at them while traveling in a vehicle. The driver fled, prompting officers to begin a pursuit before quickly ending it, CPD said.