They lock him up so he can not escape and when they finally do let him out it is only to do a robbery for a murderer named Bill Sykes(if he refuses Sykes will kill him) . within this twist of events there is another man named Monks (not in many movies but in the book). who happens to be Oliver's half brother who wants Oliver dead because their fathers will gave the bulk of the family fortune to Oliver before Oliver was born and before his mother went missing. Oliver ends up getting shot wile robbing the house and Sykes leaves him to die.