And regardless of their religion, if his parents have the means, and there is known serious mental health history with AJM, or perhaps suspected disease from a psychiatric evaluation while in custody, I suspect his parents would help him fight for an insanity defense to spare his life and to ensure he receives treatment.given that the family is Catholic, they might be opposed to the death penalty and likely to help their son fight it. If DP is off the table, they might not help him with his defense.
Just my speculation.