I'd point Jacob in the direction of the ridiculous and hilarious Cadaver Synod - where one Pope apparently so angered another Pope, the latter Pope did not let the passage of time and the former Pope's death stop him from trying the guy on all sorts of ridiculous offences. The dead Pope was apparently operated by an assistant who made the dead guy say "BECAUSE I'M EVIL!" whenever a question was asked about why he did something.
Ultimately, the dead guy was found guilty, and rather than put him to death (which would've just created an unkillable zombie Pope) they hacked off the fingers he used to bless people, and every act of his papacy was declared null and void. Then they reburied him. Then they un-reburied him and tossed him in a river.
Then another Pope later on decided Pope Formosus had not suffered enough, and so managed to find that fucking corpse, try it AGAIN and then behead the dead body (savvy fucker, chopping off the head).