MIAMI — Police said Tuesday that they charged a Miami man with first-degree murder after he confessed to suffocating his estranged wife and her two young daughters following an argument at a mall.
Alberto Luis Sierra and Gladys Del Carmen Sierra got into a fight Nov. 10 when Sierra pulled out a knife and "harmed" his 29-year-old estranged wife, according to an arrest report. Miami-Dade Police did not describe her injuries.
Sierra, 28, then took Gladys Del Carmen Sierra and her 4- and 6-year-old daughters back to the house where they had lived with him, locked the girls in a bedroom and forced his estranged wife into the master bedroom. He then suffocated her with a plastic bag and sexually assaulted her, authorities said.
Sierra later suffocated sisters Daniela and Julia Padrino with a plastic bag and also sexually assaulted one of them afterward, according to the arrest report. Miami-Dade Police said one of the girls was sleeping when she was suffocated.
The girls are not the defendant's biological children. Police say the woman's 6-year-old son was safe with his grandmother.
Sierra was charged with three counts of first-degree murder and sexual battery on an adult and on a child under 12. It was unclear if he had retained a lawyer.
A neighbor complained of a foul odor coming from the home a few days later and found Gladys Del Carmen Sierra's body in a closet next to her two girls'.
Neighbors said Sierra had recently been released from jail.