Wiktionary
archcriminal
n. A highly prolific or skilled criminal; a criminal of the highest order.
Usage examples of "archcriminal".
In his final moments he saw his mentor, the evil old archcriminal Yoshishu, shot away from the column he was clinging to like a fly from the spurt of a garden hose.
The detective work which was invested in the location of this archcriminal of the human psyche occupied many years.