When Duwayne takes a practice aim at the door to the police station, Bubba's shadow is seen behind him. When the FBI man arrives to pick up Caldwell, the building overshadows the steps, sidewalk, and parking area, meaning the sun has passed over the building. However, when Caldwell and the FBI men leave the station, they are again facing the sun.
When Duwayne throws the rifle from the church steeple, it is heard hitting the ground almost immediately. From that height, it would have taken a few seconds to hit the ground.