if he's such a confounding sociopath that could pull this off then why was he playing Aaron when he lived at the Church and allowed himself to be sexually abused by the Bishop?
This is answered during pivotal cross-examination of Stampler during the culmination of the trial.
Janet Venable: Mr. Stampler, did you believe that the archbishop wore masks?
Aaron Stampler: I'm s-s-sorry, What did you say?
V: Do you think he acted one way in public and another way in private?
S: No. N-n-no, I didn't think that.
V: Isn't that why you underlined the Hawthorne passage?
V: Mr. Stampler?
S: No, I didn't. I did not underline that book.
V: You didn't underline it?
S: No. No ma'am?
V: And you didn't carve the number referring to that passage into his chest?
S: No-o-o. No ma'am, I did not. I told, told you I -
V: You loved him. You loved him like a father . . . , even though he you and your girlfriend perform demeaning acts for his own gratification?
S: No, you don't-don't understand. He . . . there was no other way for him to c-cast out his own demons he needed it -
V: He needed to get off, Aaron! That's what he was doing! That's what he needed you for . . . to perform like a circus animal . . that was your function in his life.
V: Oh, Mr. Stampler, I'ma ask you straight, cause I am tired . . . and I've had just about all I can take of this sortedness, and I wanna go home, and I wanna wash my hands, and I wanna forget all about you . . . AND Archbishop Rushman. Did the archbishop force you and your girlfriend AND others to perform sexual acts while he watched, yes or no?!!!
S: Nn-n- yes, he did, but -
V: YES, he forced you! HE forced you using a threat of expulsion from Savior House, and a life on the street, with No heat, and No water, and No food . . . He PUT you in FRONT of a camera, he made you take off your clothes, and YOU don't think that that's another side?!!!!! Another face of a man that we all thought that we knew -