With one 'trophy' child - if Dylan had shared a bedroom with a brother, the brother would have talked to Mom n Dad. Or possibly, Dylan wouldn't have been so messed up in the first place.
This post is disturbing...so do you think that our prisons are full of only children and all people with siblings are leading full and productive lives?
How about some people are sick and/or evil due to many possible factors and some are not. I'm not sure that the number of siblings or sharing a room with a sibling is a contributing factor.