Can the Dead Possess the Living?

The Church has no official teaching on this matter. However, the general consensus of exorcists and theologians has been that this is not possible. They argue that demons have a certain supernatural power that would permit them to “override” nature, whereas a human soul would have no such power.

Also, any claims of a possessed person to be possessed by a deceased human must be viewed skeptically, since demons are liars and, according to exorcists, will avoid giving their name or identity if at all possible.