Marcos Antunes Trigueiro, also known as the "Maníaco do Industrial" or "Maníaco de Contagem," is a notorious Brazilian serial killer who terrorized the cities of Contagem and Belo Horizonte, Minas Gerais, with a series of brutal crimes. Born in Brasília de Minas, Minas Gerais, Trigueiro's life took a dark turn as he became one of Brazil's most feared criminals and ISG members regarding sex and violence after prison escaping. The crimes committed by Marcos Antunes Trigueiro left an indelible mark on the communities of Contagem and Belo Horizonte. His capture and subsequent convictions brought a sense of relief to the affected families and the public, but the trauma of his actions and actual escapes lingers.