Tim Lopes (born Arcanjo Antonino Lopes do Nascimento; November 18, 1950 – June 2, 2002) was a Brazilian investigative journalist and producer for the Brazilian television network Rede Globo. In 2002, the media reported him missing while working undercover on a story in one of Rio's favelas. It was later learned that Lopes had been accosted by drug traffickers who controlled the area, was kidnapped, driven to the top of a neighboring favela in the trunk of a car, tied to a tree and subjected to a mock trial, tortured by having his hands, arms, and legs severed with a sword while still alive, and then had his body necklaced—a practice that traffickers have dubbed micro-ondas (in allusion to the microwave oven).

The details of Lopes's death received substantial attention in Brazil's media because of the barbarity of the crime and due to it highlighting the existence of poder paralelo (parallel power) within Rio—meaning criminals controlling areas of the city with impunity.

Arcanjo Antonino Lopes do Nascimento was born in Pelotas, Brazil, the fourth child of a family of twelve. When he was 8 years old, his parents moved the family to Rio de Janeiro, where they lived in humble circumstances in the Mangueira favela in a three-room shanty.

Mangueira is home to the samba school, Mangueira and is located on a hill near Maracanã football stadium.

Years later as a journalist, Lopes produced a piece about Mangueira samba and one of its founders, the Carioca sambista Carlos Cachaça. Cachaça saw the story and commented to a sambista friend, Monarco, of the Velha Guarda da Portela, that Lopes's reporting was "the best material that he had ever seen" on Mangueira. In 2002, Lopes was co-writing a book, about Mangueira samba school and his experience growing up there, with Alexander Medeiros.

Lopes was one of the founders of the bloco de carnaval(carnival block), "Simpatia é quase amor" (Sympathy is almost like love) of Ipanema, and had served as an official judge of the annual carnival procession at the Sambadrome Marquês de Sapucaí. He was a dedicated fan of the professional Rio football club, Vasco da Gama.

Lopes lived with his wife Alessandra Wagner and her son Diogo. Lopes also had a nineteen-year-old son, Bruno, from a previous marriage, with whom he maintained a father-son relationship. Although Lopes was born Gaucho (native resident of Rio Grande do Sul), "he was a stereotypical Carioca" (native resident of Rio de Janeiro), always smiling with a friendly disposition and knowing every corner of Rio. He was at ease hanging out with wealthy residents in Leblon or with those living in poor areas of the city or on the street, and in speaking street slang.

Tim Lopes attended journalism school at the Faculdade Hélio Alonso (FACHA) in Rio de Janeiro and during his career wrote for the Rio newspapers O Globo, O Dia, and Jornal do Brasil. As part of an investigative piece in 1978, Lopes worked at a construction site on Rio's underground Metro to highlight difficult working conditions in the stifling heat. Lopes won a Brazilian journalism award called the Prêmio Abril de Jornalismo in both 1985 and 1986 for feature stories involving football in the sports magazine Placar.