Re the comment earlier about no.6 having a learning disability. I’ve worked with learning disabilities my whole life. I currently manage a home for people with LDs, and have experience ranging from mild to severe. I think if he does have a LD he’s right at the top of the milder end, or he’s right at the bottom of what’s classed as the normal IQ range. He clearly has a problem regulating his emotions which is very common at the low end of the IQ spectrum. He appears incapable of self reflection or of taking responsibility for his own actions, also hallmarks of the cerebrally impaired. It’s been said he parrots the opinions of the last person he spoke to (again, very common etc...), in other words he’s easily influenced and led, and unfortunately he was an easy mark for a venal, social climbing, malignant narcissist.
From this perspective, comments such as William’s ’I’ve had my arm around my brother our whole lives’ take on new significance.