In the County of Cauneceu ruled by a Plutocracy, a character must undergo a Trial by combat.
He has been framed by A collusion of guilds - uses resource control for leverage - and if found guilty of Treason, his punishment will be Bestow Curse. The prisoner loses 6 off his ability score. That is devastating, possibly cutting it in half or worse. Forcing them to become an imbecile is a good way to keep the person useful doing menial chores without needing high security. The GM can also craft their own Curse effect, such as 50% chance of lying down every six seconds - it’s hard to escape while taking a siesta.

County - The land ruled over by a count (or earl, in some areas).
Plutocracy - Plutocracy is rule by the wealthy, or power provided by wealth. In a plutocracy, the degree of economic inequality is high while the level of social mobility is low. This can apply to a multitude of government systems, as the key elements of plutocracy transcend and often occur concurrently with the features of those systems.
Trial by combat - Fight to the death, winner is innocent