Add a new rule to the ruleset, entitled Grudges:

Each Prisoner can have up to one Grudge, which is tracked in the GNDT. A Prisoner’s Grudge must be the name of one other Prisoner.

A Prisoner may change or clear their Grudge as a daily action.

Whenever a Prisoner’s is the Suspect or Accomplice in a Confession in which their Grudge is also a Suspect or Accomplice, and - as a result of that Confession - their Grudge’s Sentence increases, that Prisoner may Roll On their Grudge within 24 hours of the resolution of that Confession. A Prisoner Rolls On another Prisoner by increasing their Sentence by 1 and setting their own Grudge to blank.