Police are also looking for Jamilla Campbell's 17-year-old son Joshua "to ensure his safety", but he is not a suspect.
Cops in suburban Philadelphia say Shana Decree and her daughter Dominique Decree unleashed mayhem in a two-bedroom apartment. The three children's names were initially withheld, but authorities later identified them as 13-year-old Damon Decree, Jr., and 9-year-old twins Imani and Erika Allen.
'Shana later told police that everyone at the apartment, including the nine-year-olds and 13-year-old, wanted to die.
Eventually, the mother and daughter's story changed, and Shana told investigators that her family members wanted to die, claiming they were all talking about suicide, according to court documents.
Shana S. Decree, 45, and Dominique Decree, 19, the mother and daughter, were transported to the hospital for unspecified reasons and later arrested, police said.
Shana and Dominique were rushed to a nearby hospital for their "disorientation". The investigation is ongoing, police said. Morrisville Borough Police and Bucks County Detectives are investigating.
Shana and Dominique Decree then told police about a complicated plan that allegedly involved some of the victims killing each other - at least one being choked to death - and then Shana and Dominique Decree killing the rest, according to the court records.
Police said Dominique, who had visible injuries to her neck, at first denied knowing what had occurred at the apartment she shared with her mother, Shana, her sister, Smith, her aunt, Campbell, her younger brother and her aunt Campbell's twin daughters.
Shana was arraigned early on Tuesday (local time), while her daughter was expected to make her initial court appearance later in the day.
Several rooms down the hall, Shana also maintained she didn't know what happened, the affidavit said. At one point she told officers that three black males, including Campbell's boyfriend, carried out the murders.
They were found dead in a bedroom at the Robert Morris apartments in Morrisville on Monday afternoon. They said he was not considered a suspect in the murders.
Investigators remove bags from the crime scene at the Robert Morris Apartments in Morrisville, Pa., on February 26, 2019.
"I saw the landlord and said, 'What's going on?' And she said, 'We are doing a welfare check because trash is piled up out there for a while, to see if they are all right, '" the neighbor, Nicole Owens, said.