A 57-year-old Brazilian man has been indicted on murder and other charges in the fatal stabbing of his estranged wife inside her Farmingville home, a killing authorities say unfolded in front of the couple’s teenage daughter.
Suffolk County District Attorney Raymond A. Tierney announced that Marcos Aurelio Marques-Leal was arraigned March 2 on charges including second-degree murder in the death of Adriana Barbosa. Prosecutors allege Marques-Leal broke into the home on Feb. 12, 2026, and stabbed Barbosa multiple times while their 16-year-old daughter tried to protect her.
According to investigators, the attack occurred at about 8:15 p.m. at Barbosa’s residence, where she lived with the teen. Authorities said Marques-Leal was under an order of protection issued in Family Court. He allegedly tried to enter through a locked side door and attempted to kick it down. After failing, he went to the rear of the home, picked up a large planter from the deck and threw it through a sliding glass door.
Barbosa and her daughter fled to a bedroom and locked the door as the teen called 911. Officials said Marques-Leal forced his way inside armed with a knife and lunged at Barbosa. The daughter placed herself between her parents in an effort to shield her mother. Prosecutors allege Marques-Leal reached over the teen and stabbed Barbosa in the head, neck and body. The girl suffered cuts to her hands described as defensive wounds. Marques-Leal then allegedly stabbed himself in the neck and abdomen.
All three were taken to Stony Brook University Hospital, where Barbosa was pronounced dead. Marques-Leal is also charged with first-degree burglary, aggravated criminal contempt and endangering the welfare of a child. He is being held without bail and faces up to 25 years in prison if convicted.