The priest's disguise did not fool O'Mullowny, who attacked him at the funeral. Unlike other priests who had been ambushed by someone whom they thought was dying, this priest was expecting an attack and fought back. He was able to hold off Mullowney long enough for a homeless man known as McCann to stab Mullowney and kill him.
The priest's disguise did not fool O'Mullowny, who responded with violence at the funeral. Unlike other priests who had been caught off guard by someone they believed was dying, this priest was prepared and defended himself. He delayed Mullowney long enough for McCann to fatally attack Mullowney.