The story opens with "It was Monday, January 12 ...." but a calendar in the last scene shows that January 12 was a Sunday.
The pawn ticket for the stolen double barrel shotgun lists it as a "Remington model 81". The Remington model 81 was a semi-automatic rifle.
Friday twice reads the description of Maddux as having blond hair, blue eyes and being 28 years old, but the actor who plays Maddux has dark brown hair (with a couple of lighter streaks), dark eyes and is closer to 40.