Investigators have returned to the infamous Philadelphia home of the late Raymond "R.C." Horsch to search the property yet again for any clues in a case involving multiple missing women and a potential serial killer.
Philadelphia police and federal investigators were seen at the home on Monday as they executed a search warrant, missing women to the Olney neighborhood home and investigators recovered more than a million photos and videos. At least five of those women are believed to be dead.
Authorities are working to determine what the disturbing images and videos depict, particularly because Horsch was known for producing violent pornography.
Horsch, an 82-year-old who produced brutally themed pornography and books, died last year.
His son Eugene Horsch, 44, was arrested in June on charges involving unlawful firearms and forgery, which led police to make concerning discoveries at the family home.
Fox News Digital's Michael Ruiz contributed to this report.