Around 16 minutes in the second Officer is heading to the town to meet Mathews. In all the rest of the show he's driving a 55 Buick with no roof lights but here they inserted stock footage of a Ford with roof lights.
When Matthews calls in the tag number of a car, he's speaking into the wrong side of the microphone. You can see the hanger attachment. When he next uses the mic, he's speaking into the other side with the grille facing his mouth.
Matthews does not wear his gun even when investigating the stolen vehicle.