This means, of course, that by long and manifold suggestion certain selected forms of crime had been stigmatized until the masses regarded them with horror. Then the apparatus of the administration of justice was brought to bear to exterminate all who could be charged with them, and when the process was objected to as horrible, it was defended on grounds of necessity to meet the horrible crime. By this action and reaction a great body of interests was enveloped in a special atmosphere, within which any excess of savagery was possible. The societal selection was prosecuted by murder of all dissenters. +243. Inquisitorial procedure from Roman law.+ The Roman criminal procedure was, in part, inquisitorial.[553] In the later period of the republic a private accuser, who must be an injured party, started and conducted the prosecution, but the magistrates could proceed on their own motion, upon denunciation, or by inquisitorial process. The last method became the custom under the empire. Prosecutions for treason were thus carried on, and by the end of the empire sorcerers and heretics, as _hostes publici_, like traitors, were thus tried. All citizens were bound to denounce such criminals. This procedure was taken up into the canon law, so that the Christian church inherited a system of procedure as well as the doctrines above stated.[554] +244. Bishops as inquisitors.+ In the Carolingian period bishops were instructed to seek out heretics and to secure their conversion, but they rarely distinguished themselves by zeal in this matter. The procedure was that of a grand jury set in motion by common report. Lucius III and Barbarossa, acting together in 1184, prepared a decretal in which the duty of bishops was reaffirmed and an attempt was made to give sharper method to their proceedings. They were to seek out heretics, holders of secret conventicles, or any who "in any way differed, in mode of life, from the faithful in general." Those who refused to be disciplined and to conform were to be abandoned to the secular arm for fitting punishment. All civil officers were to swear to enforce laws against heretics. Here we find the fundamental notions of the later Inquisition, but zealous executioners were wanting. If the decretal had been "obeyed strictly and energetically, it would have established an episcopal instead of a papal Inquisition."