In the Fief of Dea ruled by a Technocracy, 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 Embezzlement, his punishment will be Baleful Polymorph. The prisoner permanently changes into a small animal. One of my favourite D&D modules is Castle Amber. Wouldn’t it be a neat twist for the central garden to be the prison of several banished beings changed into the form of small animals? If the subjects fail their second saving throw, they even gain animal intelligence, in effect becoming just another creature in the garden.

Fief - Land or office granted to a vassal. Ownership is technically still with the granting lord, but revenue and production is given to the vassal. The lord technically retained the right to seize the land in case of disloyalty.
Technocracy - Technocracy (bureaucratic), a governmental or organizational system where decision makers are selected based upon how highly skilled and qualified they are, rather than how much political capital they hold. A form of government in which scientists and technical experts are in control; "technocracy is described as that society in which those who govern justify themselves by appeal to technical experts who justify themselves by appeal to scientific forms of knowledge"
Trial by combat - Fight to the death, winner is innocent