Gleidson Boás/or Gleison Boás, better known as Cabo Diabo, is a former gang member, former robber, criminal, vigilante and Brazilian killer. He has killed more than 16 people, has prison tattoos on parts of his body along with scars and marks from when he was shot, stabbed, etc., several times and survived. He is usually described as a psychopath, cold and calculating. He escaped from prison in 2025 and most of his victims are drug dealers, thieves, etc. He is also a former drug addict, specifically marijuana. His videos posted on the internet went viral due to his coldness, story and way of speaking.