The ploy of taking over a dead person's identity. This can be for any number of reasons. Perhaps the character was a drifter, with no identity of their own worth speaking of and enticed by the possibility of assuming the role of their recently deceased acquaintance. They may have promised to protect the person's loved ones, want to escape their old life, or less heroically intend to con their new "family" out of money. If anyone questions their changed appearance, accent, or other details, there's often a Conveniently Unverifiable Cover Story they can use to explain it away.