The São Paulo Civil Police are searching for Sidney Rosa, 52, suspected of fatally shooting his partner, Atais de Souza Costa, 39, inside their home in São Bernardo do Campo, in Greater São Paulo.
The crime occurred last Friday (1st), in one of the rooms of the family's residence, while the couple's two children were on site. After the shot, the suspect fled across the roof and has not yet been located.
According to family members, the couple had been together for about 17 years. In recent months, however, the man's behavior had reportedly changed, becoming jealous after his partner started working as a receptionist to help support the household.
Change in behavior and discussion
According to a cousin of the suspect, Sidney, who worked as a truck driver, stopped traveling because he suspected the woman. The account also states that he began controlling Atais's routine, not allowing her to go out alone for activities like going to the gym.
On the night of the crime, the man reportedly arrived home after going out with friends, possibly under the influence of alcohol. He then started an argument with his partner.
During the altercation, he allegedly fired the shot that killed Atais. After the crime, he fled without leaving any immediate clues.
Investigation and search for the suspect.
The case was registered as femicide at the 3rd Police District of São Bernardo do Campo. The police are continuing their efforts to locate the suspect.
At this time, there is no information regarding Sidney Rosa's defense.
The investigation seeks to clarify all the details of the crime, including the dynamics of the argument and possible premeditation.
Rise in femicides is worrying.
This case occurs in a context of increasing femicides in the state of São Paulo. Data from the Public Security Secretariat indicates that, in the first quarter of 2026 alone, 86 cases were registered — the highest number in the historical series that began in 2018.
The total represents a 41% increase compared to the same period in 2025, when 61 cases were recorded.
Experts and authorities point out that the increase reinforces the need for more effective public policies to combat violence against women and protect victims at risk.
Cases of domestic violence can be reported by calling 180, the national helpline for women, as well as through specialized police stations and emergency services.
Police advise that any information regarding the suspect's whereabouts be passed on to the authorities.
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