Officers had stopped the car shortly after 11 p.m. in the 100 block of Linden Avenue, police said in a statement. A passenger armed with a gun jumped out and began running away.
An officer caught up to him and told him to drop the gun, police said. The man refused and was shot by the officer. The man began running again but was arrested nearby.
He was transported to a hospital but his condition was not known.
The Will-Grundy Major Crimes Task Force was investigating.
