Decree Sr. said he believes his foreign wife and daughter were involved in a cult.
"From my niece, apparently, they had dissected in some sort of cult that they materialized online," he told the news station. "I don't know what kind of cult. And they talked about demons around them."
Shana S. Decree, 45, and her 19-year-old daughter Dominique K. Decree are accused of Bucks County for killing their relatives, including three children, in their apartment in Morrisville, Pennsylvania north of Philadelphia.
Victims were Shana Decree's other two children, 25-year-old Naa & lrah Smith and 1
Shana decree told detectives the whole family "wanted to die", according to a probable cause. But the authorities said they are not "closer to understanding" the motive or chain of events that led to the killing.
Both women have been charged with five counts of murder and a number of conspiracies, Bucks County District Attorney's Office
Weeks of Concern
"This has happened in the last month," said Decree Sr. to the WTVD. "I think we have called children's services and call the police."
A social worker carried out a surprise visit on Monday when the family was found according to the Order. No one answered the door, so the workers asked the building's maintenance crew to check the apartment. Less than 20 minutes later, a maintenance work called 911. The apartment was in disarray, with the five bodies discovered in one bedroom, the affidavit states. Shana and Dominique Decree were found "disoriented" and taken to the hospital, writes the document.
A case officer at Bucks County Children's and Youth Social Services Agency had visited the family apartment at least once before, according to the announcement.
"We've called and controlled and done everything we needed to do," Decree Sr. told WTVD. "Every time they went, from my perspective at least they said the kids were safe, and that was not something we could do."
Mother and daughter admit murder
CNN's Nicole Chavez contributed to this report.