A Philadelphia police investigation centered on a home in the city’s Olney neighborhood has grown significantly, with authorities now linking at least five missing women to the property.
The investigation began after Eugene Horsch, the 44-year-old owner of the home, was arrested in June. Since then, investigators have searched the property and examined a large collection of digital material, chemicals, weapons-related evidence and other items found inside the house.
Police have said evidence recovered during the investigation indicates that at least two missing women may have been killed inside the home. However, authorities have not recovered human remains belonging to any of the missing women.
How the investigation began
Horsch was arrested June 19 after U.S. Park Police encountered him near Independence National Historical Park.
A woman who was with him was carrying identification belonging to Blair Tonzelli, a Philadelphia woman who had been reported missing in 2023. A search connected to the encounter led authorities to firearms, drug paraphernalia and fraudulent documents that allegedly identified Horsch as a federal law enforcement agent.
Those discoveries eventually brought investigators to Horsch’s home on West Chew Avenue in Olney.
Horsch has faced federal firearms and identification-related charges, but he has not been charged with killing any of the missing women.
What investigators found inside the home
Searches of the property uncovered a complicated collection of evidence.
Investigators found chemicals stored in hidden areas, a 55-gallon drum connected to pipes and hoses, marijuana-growing equipment and what police described as more than 100 pieces of ballistic evidence.
The digital material found inside the house has become one of the most important parts of the investigation.
Police initially reported finding more than 1 million digital images. Investigators have identified 58 people appearing in the recovered material. Sixteen of those people have been located but have not agreed to cooperate with investigators, while another 25 have been located and are expected to be interviewed.
Some of the recovered photographs and videos appear to show women who had previously been reported missing.
Police have also said some material appears to show women who may have been injured. Investigators believe they have identified four of five women appearing in particularly concerning images.
Authorities have stressed that the videos do not all necessarily document real events. Some appear to involve staged or role-playing activity, while investigators believe other scenes may depict actual violence.
Five missing women are now connected to the case
The women publicly connected to the investigation include Gabrielle Amarando, Maribel Fresses, Nicole Fusaro, Amy McHale and Blair Tonzelli.
Amarando disappeared in 2012. Police later found images of her in material recovered from the Olney property.
Fresses was also identified in images connected to the house. Police have since said evidence recovered during the investigation indicates that Amarando and Fresses were among the women they believe were killed inside the property. Their bodies have not been found.
McHale disappeared in June 2016. Her family has said that she left a voicemail for her daughter indicating that she was at the Olney house with Raymond Charles “R.C.” Horsch, Eugene Horsch’s father.
R.C. Horsch lived at the property before his death in 2025. Investigators have found material featuring him in some of the digital evidence recovered from the home.
Tonzelli disappeared in 2023 and became a central part of the investigation after her identification was found in connection with the June arrest.
Nicole Fusaro, who has been missing since 2018, is the fifth woman recently linked to the investigation, according to Philadelphia police sources.
Police have searched and excavated the property
Investigators have returned to the Olney property several times since the initial search.
Crews excavated portions of the property and examined underground pipes and other structures. Investigators have also looked into whether the chemical equipment found inside the house could have been used to dispose of human remains.
Despite the extensive searches, authorities have not announced the recovery of human remains belonging to any of the missing women.
Police did find several urns that they believe contain human remains, but investigators said those remains were believed to be connected to R.C. Horsch, his sister and a friend rather than confirmed victims in the missing-person investigation.
Evidence has raised new questions
The investigation has also drawn attention to material connected to R.C. Horsch, who was an erotic filmmaker and photographer.
Investigators have been reviewing his writings, photographs and other material found at the property. Some of the material contains disturbing descriptions of violence, but police still have to determine which events depicted or described in the material actually occurred.
That distinction has become especially important as detectives work through hundreds of thousands of images, videos and written documents.
Philadelphia police have said the evidence is being examined alongside missing-person reports, witness interviews and other investigative information.
For families who have spent years looking for answers, the investigation has provided new leads while also leaving major questions unresolved.
At this point, five missing women have been linked to the Olney home, and police believe at least two were killed there. But investigators are still working to establish exactly what happened to each woman and whether additional people shown in the recovered material may be connected to the case.
