...yep. It's retarded.
I'm going to assume the death of Dolce took place in his manor, on the Lord's land.
Meaning that, at his highest power and with utmost authority, the words of some stable hand/nobody were believed over one of his own vassals.
Fuck you-both the story and the author. This isn't some modern day justice system were you tell the cops, the Lord is THE Man in charge of this area.