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Updated at 6:28 p.m. with more details

A St. Louis man has confessed to killing a man and woman found shot to death Saturday in a Hillsdale home, St. Louis County Police say. 

Marvin Butler-Dickerson, 26, broke into the home of Dontay Davis, 25, and Ahmira McDaniel, 21, on Saturday and shot them to death, police said. 

Butler-Dickerson was charged Tuesday in St. Louis County with two counts of murder in the first degree, two counts of armed criminal action and one count of burglary in the first degree.

Hillsdale police responding to a shots fired call just before 7:30 a.m. Saturday  found Davis and McDaniel fatally shot in their home in the 2100 block of Cherry Avenue. Hillsdale police asked St. Louis County police to investigate.

Butler-Dickerson, of the 5700 block of Page Boulevard in St. Louis, was being held Tuesday in St. Louis County Jail without bail. 

The double homicide Saturday was the third of four double homicides in St. Louis County this month.

On Monday, two people were gunned down about 2 a.m. in the 5500 block of Tuttle Street in what police believe started as a carjacking attempt. A 3-year-old child and another woman in the car were not hurt. 

The victims were identified Tuesday as Richard Berry, 39, of the 1600 block of Leisure Drive in unincorporated St. Louis County, and Destiny Howard, 21, of the 6100 block of Louisiana Avenue in St. Louis. 

Detectives from the St. Louis County Police Department’s Bureau of Crimes Against Persons are investigating the homicides. Police ask anyone with information to call the St. Louis County Police Department at 636-529-8210, or to remain anonymous, call CrimeStoppers at 1-866-371-8477.

On Dec. 2, Jerry Cannon, 40, and Iesha Emery, 33, were found dead in their shared home in the 1100 block of Oran Drive. They had been shot. Tyjuan D. Cannon-Scarelli, the man’s 18-year-old son visiting from Chicago, is charged in their deaths.

On Dec. 3, the bodies of Igor Zhukov, 47, and Michele Laws, 43, were found in St. Louis County in their Nissan Sentra, which was at the bottom of a ravine in the 300 block of Bluff Drive, near Riverview and the St. Louis city border. Autopsies found that Laws and Zhukov each died of at least one gunshot.

Reporter covering breaking news and crime by night. Born in Algeria but grew up in St. Louis. Previously reported for The Associated Press in Jackson, Mississippi and at the Wichita Eagle in Wichita, Kansas.