Corrected entry: When the head of dept goes into the cold case vault and is murdered, the vault door closes behind her then she is locked inside, she is then attacked, the vault door then needs to be opened from the outside with the code. Meaning the killer would have to have been locked inside too.
Continuity mistake: SPOILERS: During the final scene, when Samuel L. Jackson is "puppeted" to lift his arm up to make it look like he's pointing a gun at the SWAT team, the number of laser-sights visible on his chest changes between cuts. In the wide-shot, there's only three, but when it punches into a close-up, suddenly there are five.
Question: Is Chris Rock's beard throughout the film an appliance, or did Rock actually grow it out? (I know his goatee in the flashback is fake, I'm talking about the beard he has during all the modern day scenes.) I could swear I saw a little glue on his chin next to his beard in one scene, like it was an appliance, but I couldn't quite tell, so I didn't submit it as a mistake.