Satan Sanderson

Harry "e;Satan"e; Sanderson is the big party guru in college, leading a dissolute guys-gone-wild kind of life that we all secretly want to be leading. But as time goes on, Sanderson mellows out, settles down in maturity, and becomes a respected minister. His college party pal Hugh Stires, however, never does reform, leaving a trail of broken hearts and enemies in his wake. Sanderson is involved in a car accident that rattles his brain so bad he comes to believe that he is Stires. He goes about trying to atone for crimes he really didn't do. By the time he recovers his true memories, Sanderson finds himself facing a murder rap. (Goodreads)