In the Emirate of Etscrile ruled by a Dictatorship, a character must undergo a Trial by combat.
He has been framed by A monster or group of monsters - mind flayers, a beholder, giants, a dragon - and if found guilty of Spying, his punishment will be Flesh to Stone. Perfect for filling an art gallery or museum. Under careful watch of security to prevent an ally from casting Stone to Flesh, prisoners can be put on display as an example to all, or kept in a private collection for the warden to gloat over or decorate as he sees fit.

Emirate - A county or land area taken care of by an emir, who is of the royal family, and considered a prince and governor.
Dictatorship - A state or government under dictatorial rule.
Trial by combat - Fight to the death, winner is innocent