olney house philadelphia

The term "Olney house" in Philadelphia refers to a property located at 417 West Chew Avenue in the Olney neighborhood, which has become the center of a major, ongoing death investigation by the Philadelphia Police Department and the FBI.

Investigation Overview

The investigation began in June 2026, following the arrest of the property's owner, Eugene Albert Horsch, during a traffic stop. During the stop, officers discovered that Horsch was in possession of illegal firearms, drug paraphernalia, and counterfeit federal credentials, and that his passenger was carrying identification belonging to a missing woman, Blair Tonzelli.

Key Details

• The Property: The home was previously occupied by Eugene Horsch and his late father, Raymond "R.C." Horsch, who died in 2025. Raymond Horsch was a self-described serial killer who authored books and produced content in which he claimed to have murdered women and disposed of their remains using chemical processes.
• Missing Persons: Authorities have linked the property to the disappearances of at least five women who are now presumed dead: Gabrielle Amarando, Maribel Fresses, Nicole Fusaro, Amy McHale, and Blair Tonzelli.
• Evidence Recovered: Investigators have seized a massive amount of digital evidence from the home, including over 1 million images and hundreds of thousands of videos and documents. Some of this evidence appears to show women, including those reported missing, in unconscious or deceased states.
• Physical Findings: During multiple searches and excavations of the property, police discovered hidden compartments, dangerous chemicals, a marijuana-growing operation, ballistic evidence, and urns containing cremated remains. Despite extensive searches, including the excavation of sewer lines, no human remains have been formally recovered or identified as belonging to the missing women.

The investigation remains active as authorities continue to process the large volume of digital and physical evidence seized from the site.