Three children and their parents were found shot to death Sunday night in the family's home in Culpeper, Va. Police believe the shooting was a murder-suicide.

The bodies of Clarence and Shauna Washington and their three daughters—four-year-old Olivia, 6-year-old Onya, and 13-year-old Omesha—were discovered by Shauna's mother and cousin, who visited the house after not hearing from the Washingtons that day.

Clarence and Shauna were reportedly having marital problems, and family members and friends said the couple had been fighting Saturday evening.

From NBC Washington:

When Shauna Washington's mother and a cousin went to the home at 14458 Rixeyville Road on Sunday night, they found it locked up and forced their way in through a window. Inside, they found the bodies of the family and called authorities around 10 p.m.

Another one of Shauna Washington's cousins, Nicole Minor-Melvin, said that Shauna was more like a sister to her, and described her as an incredibly involved and loving mother who headed up two Girl Scout troops at the Daisy and Cadet levels.

Minor-Melvin said Shauna Washington had wanted out of her marriage, but Clarence didn't. She said she'd never imagined something like this would happen.

Shauna's family also told NBC Washington that Shauna was set to start a new job, as an insurances saleswoman for AFLAC, on Monday.

Police are still investigating, though Detective Angela Deavers with the Culpeper County Sheriff's Office and Shauna's family told reporters that they believe Clarence was the gunman.