Juan Rinez is a character on DEXTER. He was a pimp who murdered one of his prostitutes named Julie Piotrowski, as well as Dexter's fourth human victim. It was later revealed that Rinez was also a murderer of Davey Sanchez, therefore making him a personal adversary of Harry Morgan (which was also evident in Harry's special attention to Piotrowski case) and Dexter (who was impressed by the fact that Rinez killed a cop and was able to be free of charges).