Sociopath a.k.a. Psychopath
When you are under libelous attack by a person who has deceived and defrauded you, there is a possibility that the person is a sociopath. Sociopaths have no heart, no conscience, and no remorse.
They will lie, cheat, and steal from you, then convincingly tell everyone that you are doing those things, and that everything is your fault.
See also: Denial and DARVO