As Tom is sitting on the bed thinking of his wife he reaches under the bed for a box and the clock in the background reads 11:40. We then see a close up of Tom smelling her perfume and the clock now reads 11:38.
At the end, Ed Harris is pointing his gun at Samuel Jackson with the trigger in the rearward position, something that only happens when the double action/single action Beretta is cocked. The trigger should be at rest, in the forward position. When agitated, Ed cocks the hammer and we see that the trigger is still in the rearward position. Only at cocking should the trigger have gone from forward position to rear position.
Tom Cutler and Ann Norcut meet with Arlo Grange (the police coroner?) for Ann to identify her husband's body. When Vargas shows up, Tom uses the ruse that he just happened to be there and was going to go to lunch with Arlo as soon as Arlo was free. According to the clock on the wall, it was 5:30; whether a.m. or p.m., it was nowhere near time for lunch.