William gulls son in law

Des anybody else agree that theo had a right to be a bit pissed at William gull.
All the way through he drops sly little hints at abberline that his son in law is a brill surgeon and knows where everything is.
He even asks how long a renal artery is. I would have gone to abberline and told him I'm suspicious of my father in law cos he's studying mental instability and he's a fantastic surgeon. I didn't understand him screaming at the end though. I'd have said to him why are you shaking and shouting then?? What's wrong with you, I'm not arresting you am I. I also think police commissioner was wrong, he should have hung gull not let him off, that's taking the piss.