On the evening of Monday, October 16, police in São Luís arrested a man suspected of being one of the shooters responsible for the murder of prison guard Domingos Macal Ferreira, also known as "Romário." The murder occurred on March 4, where Romário was shot and killed in Matinha, raising concerns regarding the safety of law enforcement personnel in the region. The leading suspect in the case has surrendered to the police with legal representation, and a temporary arrest warrant was executed.

According to Weverton Valois, the chief investigator from Matinha, the arrested suspect is believed to have been involved in the gunfire that killed Romário, who was targeted due to his role as an administrative officer at the local police station. This incident highlights the increasing risks faced by law enforcement officials in Brazil, as they often become targets due to their professional engagements, especially in areas with high crime rates.

Ongoing investigations have revealed that up to eight individuals may have participated in the crime, with one remaining fugitive. This situation represents a worrying trend of violence against prison officers and signals an urgent need for protective measures within the Brazilian penal system, emphasizing the broader implications for public safety and law enforcement effectiveness.