I've never seen such a foolish duke. "Oh someone you trusted is actually someone bad and has tons of evidence to back it up-"
"NO NO I STILL TRUST HIM HE WAS MY FATHERS MOST TRUSTED MAN I TRUST HIM YOU LIE EVIDENCE SHIT HEGHHHHHHHHHHHHHHHHHH I'M MORE POWERFUL THAN YOU SO SHUT UPPPPPPPPPP"
Its as if he's a kid.
The familial relationship is so cute