Philadelphia prosecutors have withdrawn from the Olney home mystery case as the federal investigation continues, according to court records. At a preliminary hearing Thursday, state prosecutors withdrew all five charges against Eugene Horsch, 44, who was at the center of a large police search in June. Horsch still faces federal charges for possession of a firearm by a felon and possession of an unlawfully produced document and authentication feature. “Given that the federal government is taking over, it’s appropriate what the state did,” Horsch’s attorney told NBC10 Investigators. On June 19, federal park rangers arrested Horsch on drug-related charges, according to court records. Information obtained after his arrest led investigators to search a home on West Chew Avenue beginning June 25. On July 9, NBC10 Investigators learned that a federal grand jury indicted Horsch on charges connected to false FBI credentials. Federal authorities seized the DEA credential during Horsch’s initial arrest. The FBI credential was found during the search, according to court documents. Officials also seized a desktop computer. Inside the Olney home Horsch shared with his late father, Ray Horsch, federal agents and DEA task force officers discovered “a lot of ammo and some narcotics,” Philadelphia police said in the aftermath. Investigators also found evidence suggesting an attempt to grow or produce narcotics. Among the items seized was a piece of writing about serial killer Ted Bundy that referenced zip ties and a drum, a source familiar with the investigation told NBC10. The note also mentioned killings and “trash that needs to go.” It remains unclear who wrote it, though Eugene Horsch’s attorney suggested Ray Horsch was the author. On July 22, Philadelphia police began digging up a pipe at the Olney property, after officials said it is possibly connected to the disappearance of at least one woman. Horsch was transferred to federal custody after federal prosecutors charged him. A jury trial in the federal case was scheduled for Sept. 8. NBC10 investigative reporter David Charns can be reached at [email protected]. ...read more read less