Killer Croc is a supervillain appearing in American comic books published by DC Comics. Created by Gerry Conway, Don Newton and Gene Colan, the character was introduced in Batman #357. He has become one of the most enduring enemies of the superhero Batman and belongs to the collective of adversaries that make up his rogues gallery.

Gerard Francis Conway is an American comic book writer, comic book editor, screenwriter, television writer, and television producer. He is known for co-creating the Marvel Comics vigilante antihero the Punisher as well as the Scarlet Spider, and the first Ms. Marvel, and also writing the death of the character Gwen Stacy during his long run on The Amazing Spider-Man in the story arc, "The Night Gwen Stacy Died".