After receiving a commission from the Archbishop of Mainz, Siegfried II, Konrad set to work seeking out heresy in both Thuringia and Hesse, and quickly gained a reputation for being unreasonable and unjust. According to most accounts, Konrad accepted almost any accusation as true, and regarded suspects as guilty until proven innocent. Those accused of being heretics were quickly sought out by Konrad's mobs, and told to repent or else be burnt at the stake. Those accused of heresy were also encouraged to denounce others, with the implication that their own lives might be spared if they did so. Konrad included commoners, nobles and priests in his inquisition: Heinrich Minnike, Provost of Goslar, was one of Konrad's first targets, and was burnt at the stake.