Wiktionary
supercriminal
n. A very skilled or powerful criminal.
Usage examples of "supercriminal".
But--granting all this--it was none the less true that the utmost diligence, spurred by the pique, ill-will, and ambition of the police of all Europe, had failed as yet to forge any link between the supercriminal of the age and the distinguished connoisseur of art.