Also see definition of "Malefactor" in Word Study
Malefactor
MALEFACTOR [isbe]
MALEFACTOR - mal-e-fak'-ter (kakopoios, "a bad doer," i.e. "evildoer," "criminal"; kakourgos, "a wrongdoer"): The former occurs in Jn 18:30 the King James Version, the latter, which is the stronger term, in Lk 23:32,39. The former describes the subject as doing or making evil, the latter as creating or originating the bad, and hence, designates the more energetic, aggressive, initiating type of criminality.
Also see definition of "Malefactor" in Word Study