Honestly, I wouldn´t be surprised if he actually drew pictures of his victims in the show, and RT used actual vectors for those pictures. Another show I watched has done that before, where one of the protagonists has drawn a picture of one of the antagonists after seeing him for just a few seconds, and someone pointed out that the show´s creators used actual vectors, which, seeing that this is a cartoon, means that this character can draw people as if it was a photograph after seeing them only once.