20-year-old man shot, killed during attempted robbery at Calumet Heights gas station

CHICAGO (CBS)-- A 20-year-old man was shot and killed during an attempted robbery in a gas station parking lot in Calumet Heights. 

Police said the deadly encounter occurred around 12:15 a.m. near 95th Street and Stony Island Avenue. 

A witness told police the victim was shot as he tried to speed away from an armed robber. 

A bullet struck him in the head, causing him to crash into a tree. 

Police are still looking for the shooter.