Who is Minos P. Dautrieve and Monroe from Heaven's Prisoners and what is their importance?

Minos P. Duatrieve is an ex-college-basketball player who works as a law enforcement officer for the DEA. Dautrieve is described as a muscular man in excellent shape with blond hair worn in a crew cut so short that his scalp is always visible. Duatrieve befriends Dave and the two men develop a working relationship and, later, genuine friendship. Throughout the novel, Dautrieve functions as a voice of caution, restraint, and reason to offset Dave's rash behavior—Dave consistently ignored Dautrieve's advice. Dautrieve is a minor but recurrent character who acts as a sounding board for Dave and who occasionally provides crucial pieces of information.