Who helped Guillaume de Nogaret capture Boniface VIII at Anagni?

Guillaume de Nogaret was assisted in the capture of Pope Boniface VIII at Anagni by Sciarra Colonna, a member of a prominent Roman noble family that held a long-standing, bitter feud with the pope.123

Nogaret, acting as an agent for King Philip IV of France, also collaborated with various Italian factions that were hostile toward Boniface VIII. The attack, which took place on September 7, 1303, was the culmination of a coalition between the French crown and the Colonna family, both of whom sought to undermine the pope's authority. While the use of violence against the pope was a grave act of intimidation, it is important to recognize that such actions represent a rejection of ethical standards regarding the sanctity of the individual and the rule of law.1423