Kriesmann Henckler

Short and plump with balding head and the ruddy complexion of a man given to too much drink, Kriesmann Henckler hardly matches the common perception of a witch hunter. However, it is within the shadows that this ferociously pious Sigmarite wages his war. Employing an evidence-gathering army of some forty men and women, he engineers the downfall of Sigmar's enemies from a distance.

His finest hour was the destruction of the Grey Haze, a vile Slaaneshi cult that was responsible for an outbreak of child abductions throughout many of the Empire's largest cities. At his order, all two hundred and sixteen members of this insidious organisation were seized in one night. At the resulting trial, held in Grunburg, Henckler systematically found every cultist guilty as charged, the strength of the evidence he had spent months gathering shattering any and all alibis and pleas of innocence -- and every member of the Grey Haze was sentenced to death by conflagration.

Source
pg. 87
 * White Dwarf 30 Year Anniversary Edition