Pure Insanity (Destiel)

Dean Winchester, age 26, is sentenced to stay in the Kansas State Criminally Insane Asylum for trying to murder his only brother, Sam. Dean has pyschopathic tendencies, suicidal ways, and the core of it all; schizophrenia. The Winchester man hears many voices, that of his dead father, Crowley; a proclaimed demon, and the one and only, an Angel named Castiel. When he gave into the voice of Crowley, that's when everything fell apart. Crowely made him do terrible things to others, aswell as feed into his raging depression; Crowley gave Dean the one way ticket to hell. But when Dean starts to hear the angelic voice of Castiel more and more, he starts to get feelings for just a small voice in his head, or is the voice real? As Dean starts to feel more and more insane, he starts seeing apparitions of the so called Castiel: Voice in Dean's Head. Will Castiel help the spiraling man? Or is he just another pigment of Dean's insanity?
(set in the time frame of the late 60's, early 70's)