Wiktionary
posthumous execution
n. The ritual desecration of the body of a dead person.
Wikipedia
Posthumous execution
Posthumous execution is the ritual or ceremonial mutilation of an already dead body as a punishment.
Usage examples of "posthumous execution".
News of the posthumous execution of Alderman Berry, whom he remembered as an incorrigible hand-shaker and tops for humility among the highly competitive penitents of the New Zion Brotherhood, had put him in an even better humour than usual.
He conceived a horror, be she what she might, of her remains being profaned by the outrage of a posthumous execution.