In Part 3 of Steve Niles and Kody Chamberlain’s “Dead Bill Dead,” Billy learns that being turned into a vampire is only the beginning of his problems. And Matt Fraction and Ben Templesmith continue “Juarez; or Lex Nova and the Case of the 400 Dead Mexican Girls,” their harrowing, horrific story. All in the third issue of IDW’s ongoing exploration of Steve Niles’s vampire-filled universe.