cullprit
Da pathetically-inept/bumbling "bottom of da heap" or "floor-sweepings" type of crook who is such a doofus in his commissions of his crimes dat he puts all criminals to shame.
Most cullprits hafta operate alone because nobody else in da field of crime wants to work with them for fear dat da klutzes' atrociously-blundering ways --- which often make da cops' job of apprehension a lot easier --- will risk getting THEM caught, as well.