Philadelphia police announced Thursday that the 29-year-old son of a couple found fatally shot in their home Wednesday has confessed to murdering his mother, stepfather and two half-brothers. Maurice Louis has been charged with four counts of criminal homicide for allegedly shooting and killing 51-year-old Janet Woodson, 56-year-old Leslie Holmes, 18-year-old Sy-eed Woodson and 7-year-old Leslie Holmes Jr. in their West Philadelphia home, police said.

Officers responded to the home on Walton Avenue around 12:40 p.m. Wednesday for a welfare check after the couple didn’t show up to work that morning, which police said was out of character for them.

They worked at a nursing home in Northeast Philadelphia, according to Fox 29. When no one answered the front door, police said officers entered the home through a second-floor window using a ladder truck from the fire department.