Continuity mistake: While Reese and the witness are hiding in an apartment, the door is opened by the student to dismiss the bad guys with the chain lock on the door. The door is open about 18 inches and yet when the student closes the door the chain lock is normally sized about 4 inches and is still attached.
Person of Interest (2011)
1 continuity mistake in Witness
Starring: Jim Caviezel, Taraji P. Henson, Amy Acker, Michael Emerson, Kevin Chapman
Factual error: The bounty hunter, Frankie's, car has a Florida license plate on the front of the car. Florida only issues one license plate for vehicles, and it goes on the rear of the vehicle. (00:15:15)
[Elias has been captured but triggered a trap, killing some of Dominic's men.]
Dominic: You think that changes anything? I still won.
Elias: Then why aren't you smiling?
More trivia for Person of Interest