Roneys Fon Firmino Gomes

The first case in Maringá on March 14, 2019 was that of Edinalva, who died in 2010. The defendant answered for the crimes of double-qualified homicide (through asphyxiation and through concealment, since he would have deceived the victim by saying that they would it sexual) and corpse concealment.

Mara Josiane dos Santos: 36 years old, strangled. Her body was found on July 27, 2017. It was along with Mara's clothes that police found a piece of Roneys' car, leading to his arrest.

He was arrested on July 30, 2015, after police found traces of some materials around the body of the victim Mara Josiane dos Santos, who was discovered three days earlier.

Police were already working on the possibility of a serial killer in the area, having mapped all deaths in similar circumstances over a number of years, but it was only after finding the body of Mara Josiane dos Santos on July 27, 2015, did they arrive at Roneys', after finding traces and video images that put him at the crime scene.

Edinalva José da Paz: killed at age 19 by asphyxiation, her body was discovered on December 7, 2010. Roneys did not admit to this murder, but the victim's phone was found to be in possession of one of the killer's friends.

He operated in the city of Maringá, Paraná, between the years 2005 (possibly 2001, according to O Diário) and 2015, and he is considered by the state's police to be among their deadliest serial killers.