Caio Henrique is a Brazilian serial killer, spree killer, mass killer, torturer, and vigilante who primarily targeted criminals, religious figures, politicians, and militias. His methods of operation included torture, dismemberment, and mutilation. Although originally from Rio de Janeiro, he also operated in other states. After several escapes from custody, he eventually surrendered by his own free will and is now held in isolation within the prison system. He is also known for his extremely unhygienic habits, which included a neglect of personal grooming such as showering and brushing his teeth. In addition to his violent methods and vigilante targeting, he was characterized by nocturnal habits.