Marcos Antunes Trigueiro, often referred to as the "Industrial Maniac" or the "Contagem Maniac," is a Brazilian former driver and serial killer who operated primarily in the cities of Contagem and Belo Horizonte, Minas Gerais. Born in Brasília de Minas, Minas Gerais, Trigueiro gained notoriety in the late 2000s for his cold and calculated killings, which instilled fear throughout the region. The police investigation revealed that Trigueiro was a meticulous planner, using his knowledge of the area and his transportation job to target and abduct his victims. His actions sent shockwaves through the community, and his trial became a significant legal event in the region.