This appears to be orders from the Grand Crusader of the Scarlet Crusade himself, Dathrohan. It seems that Aeonas has run afoul of the Crusade. Judging by the scene before you, it appears that the Crusade was able to follow Aeonas here and apprehend him. It appears that he did not go down without a fight. The charges levied against Aeonas are grave, but that would explain some of the scene you came upon in Desolace.