Investigators have discovered human DNA in several locations inside a Philadelphia home that has become the center of a massive investigation involving seven missing women, five of whom are presumed dead.
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According to CBS News Philadelphia, Philadelphia police and the FBI returned to the property at 417 West Chew Avenue in the city’s Olney neighborhood Monday night, using a chemical called luminol to search for traces of blood. The chemical can reveal evidence of blood that may otherwise be invisible to the naked eye. Police sources confirmed Tuesday that human DNA was recovered and will undergo additional testing. No human remains have been discovered at the property.
The investigation has intensified in recent weeks, with authorities dismantling portions of the residence and examining evidence collected from inside the home…
Investigators previously recovered a 55-gallon drum, containers filled with an oily, sludge-like substance and an extensive collection of photographs and videos. More than one million pieces of photographic and video evidence have reportedly been recovered, with investigators continuing to examine the material for possible evidence of foul play. The residence was previously owned by Raymond “R.C.” Horsch, who died in 2025 and has been described by law enforcement sources as a suspected serial killer. His son, Eugene Horsch, remains in federal custody on unrelated drug and weapons charges.
The case began in June 2026 following a traffic stop near Independence Hall in Philadelphia, where authorities encountered Eugene Horsch and a woman carrying identification belonging to Blair Tonzelli, who had been reported missing in 2023. The discovery eventually led investigators to the family’s Olney residence, where searches uncovered unusual basement equipment, chemicals, weapons and extensive digital evidence…
Authorities subsequently connected the property to several missing women, including Nicole Fusaro, Maribel Fresses, Gabrielle Amarando and Amy McHale, the former wife of Raymond Horsch. Investigators believe at least five of the seven missing women are deceased, although no bodies have been recovered and the investigation remains ongoing.
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