Tennessee Highway Patrol cars are black with tan, not white with the words "State Police" running down the side.
Police cars in Tennessee use GOVT Service white plates and not the standard issue passenger car plates (plus TN doesn't use front plates for passenger cars)
Chattanooga Police uniforms are Navy Blue with a City of Chattanooga Police patch and badge, not light blue with generic patches and badges as the officer was wearing in the apartment.
When Evan Greeter shoots Jason Shalet, there are three gunshot wounds, but only two shots are heard.