Document under seal. Extract From the Decrypted Personal Files of Inquisitor Hyronimus Drake.
Possible evidence of duplicity on the part of former High Inquisitor Drake.
Cross-reference to Exhibit 107D-21H (Report to High Inquisitor Toll).
Walk in the Emperor’s Light.
I have personally put several of the heretic commanders to the question. Under extreme duress and in the presence of sanctioned psykers they have revealed much. As always with heretics, it is difficult to sift through their deluded rantings and extract the core of truth, if any truth there ever be. The heretics of Karsk System have fallen into many of the Ten Great Errors. They believe themselves to be the sole possessors of cosmic truth and the true bearers of the Emperor’s Word. They believe us to be deluded invaders even in the face of their demonstrable error. They are prepared to die in the service of the false beliefs they hold.
Most of their commanders seem sincerely to believe, as is always the case, and refused to recant even under instructive surgery. The capacity to hold to such faith is admirable and I believe will prove most worthy once this world is re-educated into the Faith.
We have so far failed to take one of the so-called Sons of the Sacred Flame alive. When on the verge of capture they spontaneously combust, often taking those sent to bring them to the question with them into death. They have demonstrated psychic powers of alarming strength. I am reminded of many other heretics I have encountered who were proven to have drawn their power from daemonic sources. So far there is no proof that the Sons of the Sacred Flame draw energy from the Enemies of Mankind but I fear it will only be a matter of time before this is shown to be the case.
In the meantime, I have placed a request at the highest level that sufficient resources be allocated to the capture of a ranking member of this cult so that we may get to the truth of the matter. I am also ensuring that agents of the highest degree of competence and discretion are being infiltrated into position in the locality.