EXCLUSIVE PHOTOS: PHILADELPHIA — Police have returned again to a home in Philadelphia’s Olney neighborhood, where they collected “glass vials,” a vacuum cleaner, workout equipment and other items, photographs show.This is after city police have said they recovered more than a million pieces of digital evidence from the home, described as a “house of horrors” in some reports.It used to belong to a pornographer named Raymond “RC” Horsch, who died last year at 82.PHILLY SERIAL KILLER PROBE COULD EXPOSE LARGER NETWORK BEHIND APPARENT ‘SNUFF’ FILMS, EXPERT SAYSOne evidence bag was photographed with a partially legible label. It listed “glass vials,” a “board” as well as references to a bin and drawers.Investigators were also seen taking out a rowing machine and a vacuum cleaner among boxes and bags of packaged evidence Monday.”The investigation remains active and ongoing,” a Philadelphia police spokesperson told Fox News Digital Tuesday. “Additional information will be released as it becomes available and is appropriate for public release.”Horsch specialized in sadistic themes — some of which may ultimately prove to be nonfiction after investigators say evidence in the home has been linked to seven separate cases involving missing women.GILGO BEACH SERIAL KILLER REX HEUERMANN KEPT ‘DEXTER’-STYLE KILL ROOM BUT WASN’T AS SMART AS HE THOUGHT: DAPhiladelphia police have repeatedly revisited the building following the June arrest of his 44-year-old son, Eugene Horsch, on drug, firearms and forgery charges.While searching the home after his arrest, police allegedly found “snuff” videos believed to show multiple missing women, a drum of chemicals hooked up to the water system and five urns that contained what police said might be human ashes.PHILADELPHIA HOME LINKED TO 7 MISSING WOMEN, LATE RESIDENT’S POTENTIAL ‘SERIAL KILLER’ MEMOIR INVESTIGATEDFOLLOW THE FOX TRUE CRIME TEAM ON XFour of the seven missing women believed to be connected to the home have been identified in those images, according to authorities.Only some of them have been publicly identified. Philadelphia police identified Maribel Fresses, 26, who vanished in 2018, and Gabrielle Aramando, 27, earlier in the investigation.During Eugene Horsch’s arrest, the woman with him had an ID for Blair Tonzelli, 38, who was last seen in Philadelphia in February 2023, police told Fox News Digital in September.Two other women were identified in local reports. Both are listed as missing persons in the National Missing and Unidentified Person System, or NamUs.One is Horsch’s ex-wife, Amy McHale, 54, who was 44 when she was last seen on June 13, 2016, the Philadelphia Inquirer reported in June.The other is Nicole “Nikki” Fusaro, 34, according to CBS’ Philadelphia affiliate, citing local police sources.SIGN UP TO GET THE LATEST TRUE CRIME NEWSShe was 27 when she vanished near the intersection of Kensington and Allegheny Avenue in July 2019.CLICK HERE FOR MORE FROM THE FOX TRUE CRIME HUBInvestigators said they have also identified dozens of other people from the images.Excavation crews have previously been seen searching outside and under the home, including the sewers.GOT A TIP?The younger Horsch has not been charged in connection with any of the missing women. But at the time of his unrelated arrest in a BMW at the city’s Independence Mall, authorities allege that the woman with him was carrying one of their IDs.LISTEN TO THE NEW ‘CRIME & JUSTICE WITH DONNA ROTUNNO’ PODCASTDr. Kris Mohandie, a board-certified forensic psychologist, has warned that the elder Horsch may have been part of a wider network centered on the production and distribution of “snuff films.”GET BREAKING NEWS BY EMAIL”The fact that the father was involved in the pornographic industry indicates that there may have been, in addition to the sadistic motives that we usually see in serial murders, that there may have been profit in distribution of so-called snuff films,” he told Fox News Digital previously.The older Horsch was a convicted producer of methamphetamines and an author of sexually explicit and violent books. In one, 2014’s “Empathy,” there is a chapter about dissolving a murdered woman’s body with boiling chemicals.