Deformed criminal (4)
I believe the answer is:
bent
I believe this is a double definition.
'deformed' is the first definition.
(bending is a kind of deforming)
'criminal' is the second definition.
(bent can mean corrupt or criminal)
(Other definitions for bent that I've seen before include "Morally crooked" , "Crooked; grass" , "Dishonest; angled" , "Angled or curved" , "Angled; grass" .)