Formosus

 This pontiff, who only lasted one year as the head of Catholicism, had real issues with his predecessor, Pope Formosus.

Five Very Naughty Popes | myFiveBest 2010

As Notre Dame scholar Richard P. McBrien recounts in Lives of the Popes, Formosus' cadaver was "propped up on a throne in full pontifical vestments" for the trial, and after his conviction, "three fingers of his right hand by which he swore oaths and gave blessings were cut off."

There's A Good Reason Why Benedict's Not An Organ Donor Josh Fleet 2011

 Between the years of 896-897AD, Pope Steven thought Pope Formosus had reached the papacy under false pretenses.

Five Very Naughty Popes | myFiveBest 2010

 Formosus was found guilty of all charges, stripped of his vestments, and had three of his fingers removed (I have no idea why?)

Five Very Naughty Popes | myFiveBest 2010

As Notre Dame scholar Richard P. McBrien recounts in Lives of the Popes, Formosus' cadaver was "propped up on a throne in full pontifical vestments" for the trial, and after his conviction, "three fingers of his right hand by which he swore oaths and gave blessings were cut off."

There's A Good Reason Why Benedict's Not An Organ Donor Josh Fleet 2011

 However, Formosus was already dead (you get to be pope for life).

Five Very Naughty Popes | myFiveBest 2010

• Nine months after his death in 896, Pope Formosus 'body was exhumed by his successor, Stephen VI, and subjected to a mock trial in which the dead pope was found guilty of perjury and other crimes.

USATODAY.com - Papal funeral merges spectacle, symbolism 2005

Anglican "pedigrees" are definitively traceable to Pope Nicholas I and the consecration of Formosus of Porto in 864.

For those in "ecclesial communities" Fr Timothy Matkin 2007

Formosus, his predecessor, and had the head of it cut off; that

A Philosophical Dictionary 2007

The carcass was prosecuted, condemned, excomunicated, mutilated and then thrown into the Tiber after being dragged through the streets, thereby insuring that Formosus is remembered to this day.

Have I been too kind to the late Andrea Dworkin? Ann Althouse 2005