When the hands of the wall clock are changed, the time shows half past five, with the hour hand correctly between the 5 and the 6 and the minute hand on three 5. In the next and subsequent shots both hands are on the 6.
When Charlie is searching the house while using a flashlight, the beam of light is not from the flashlight, angle is wrong and his wrist is exposed in the beam of light.
When Charlie looks over the wall to determine the trajectory of the bullet, it is obvious that the tower he sees is a painted backdrop.
When the camera dollies back from Charlie working with his forensic kit, its shadow can be clearly seen.