The Serpent's Mark: Robert L. DuncanLas Vegas. In the searing heat of this gambling mecca, three bodies have been found, clearly the victims of a delusional serial killer. The police are baffled and there are no clues to the identity of this dangerous psychopath. Only one man, a Catholic priest, holds the key to stopping the brutal psychopath but he is bound by sacred duty to keep silent. Then the priest's bloody corpse is found in the arid wilderness outside the city, wedged between