When Detective Loki is speeding to the hospital at the end, he passes the same restaurant (with a red awning) three times: once as he pulls off the smaller road onto the major road, and twice after that.
When Loki leaves Keller's house and is sitting in his car about to leave, he has a toothpick in his mouth. Keller runs out of the house to speak to him and Loki curses, opens the car window and talks to Keller while still chewing the toothpick. In the very next scene showing Loki in the car, the toothpick is gone.
The area code on Dover's truck is 570, which is the Scranton/Wilkes Barre area of Pennsylvania, but the license plate on Loki's car indicate Montgomery County, which is a couple of hours south and does not use the 570 area code.
Detective Loki works for a municipal police department in Pennsylvania yet all of the police cars with lights activated have only blue lights. Blue lights in Pennsylvania are "courtesy lights" for volunteer firefighters/EMS personnel private vehicles. They are not emergency lights with any traffic control powers. Police use either a combination of red and blue or, if using a single light, red only.
In the first scene, Keller is deer hunting with his son. We then see the two families celebrating Thanksgiving. The film takes place in Pennsylvania, where deer hunting season does not begin until the first Monday after Thanksgiving.