Other mistake: When Eddie Sanger is saving Kathleen Riley from "Michael", he gets slashed in the chest, through his leather jacket and sweater. When they meet up the next day, he is wearing the same leather jacket. Although the front is not shown, it is the same type and colour and obviously same jacket. He doesn't seem to be the type who would wear a slashed and likely bloody leather jacket.
Suggested correction: He gets cut through the sweater only. The jacket was unzipped and does not get damaged, therefore the fact that he is wearing it a few days later is a reasonable decision.
Revealing mistake: Carl is supposed to be deaf. However a few times in the early interrogation room with the officers and Kathleen, or just Kathleen alone (during questioning) his body movements and reactions reflect otherwise. Unless he is just keenly aware of his immediate surroundings.
Suggested correction: Looking at the scene that I at least think you were talking about, or any other scene for that matter, Liam Neeson does nothing that I would not expect a deaf person to do. It's not like he reacted to a loud sound that a deaf person shouldn't be able to hear. I see nothing out of the ordinary. Perhaps if you use a specific example.
