Malefactor

For years past I have continually been conscious of some power behind the malefactor, some deep organising power which forever stands in the way of the law.

Source: tatoeba (7416461)

For years past I have continually been conscious of some power behind the malefactor, some deep organising power which forever stands in the way of the law, and throws its shield over the wrong-doer. Again and again in cases of the most varying sorts--forgery cases, robberies, murders--I have felt the presence of this force, and I have deduced its action in many of those undiscovered crimes in which I have not been personally consulted. For years I have endeavoured to break through the veil which shrouded it, and at last the time came when I seized my thread and followed it, until it led me, after a thousand cunning windings, to ex-Professor Moriarty of mathematical celebrity.

Source: tatoeba (7416466)

‘Pull yourself together, Bradshaw,’ said the lawyer. ‘This suspense, I know, is telling upon all of you; but it is now our intention to make an end of it. Poole, here, and I are going to force our way into the cabinet. If all is well, my shoulders are broad enough to bear the blame. Meanwhile, lest anything should really be amiss, or any malefactor seek to escape by the back, you and the boy must go round the corner with a pair of good sticks, and take your post at the laboratory door.

Source: wiktionary

Though your unseen malefactor’s actions may give the impression of confidence… Vaermina suspects he is terrified his plan will go astray.

Source: wiktionary