How exactly are you supposed to prove theft in a world with no camera and the concept of reasonable doubt and conflict of interest (AKA it make anyone who work in the count's territory unfit as a witness)?
Nope, that's a mistake. 'Show don't tell' is a useful guideline, but it isn't an absolute law of writing. There are some places where 'telling' is totally acceptable, if that improves the story's pacing. Everything is a matter of balance.