Malefactor

mal-e-fak'-ter (kakopoios, "a bad doer," i.e. "evildoer," "criminal"; kakourgos, "a wrongdoer"): The former occurs in Joh 18:30 the King James Version, the latter, which is the stronger term, in Lu 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.

⇒See the definition of malefactor in the KJV Dictionary