Marcos Antunes Trigueiro is a Brazilian serial killer convicted of five homicides committed in Contagem, Minas Gerais, between 2009 and 2010. His crimes involved sexual assault followed by strangulation or asphyxiation, forming a consistent modus operandi that linked the cases. After completing the maximum sentence allowed under Brazilian law, Trigueiro lives alone under strict state monitoring and medical supervision. His family and former spouse relocated shortly before his release out of fear of reprisals and public exposure. He reportedly retains morbid interests in true crime, violence, and the study of other serial killers, along with admitting manipulations in his interviews.