Details? Well - you know how it is. The Inquisition saw a purple flag, and knew that it was the undead vileness of Ermor. As it turned out, they confessed (oh how they confessed!) to sheltering the undead, using a tax shelter to fund massages, slaying JFK, and voting for Perot.
It was good for the junior inquisitors to see such evidence of the Inquisitions infallibility - not like earlier times, when they witnessed the attack of a purple flag which was not properly overcome. Remember - on a good day, even an orange flag can look purple.