DNA found at Olney "house of horrors" in Philadelphia after investigators used luminol to search home, sources say

DNA was found at the Olney "house of horrors" in Philadelphia after investigators sprayed luminol to search the home on West Chew Avenue, police sources said Tuesday. 

Philadelphia police and the FBI were back at the home Monday night to use luminol to search for signs of human blood. Police sources said Tuesday that the DNA found at the Olney house will be tested further. 

It was found in several locations of the residence at the center of a massive investigation, according to police sources. 

The home, which was owned by Raymond "R.C." Horsch until he died in 2025, and his son, Eugene Horsch, is linked to as many as seven missing women. So far, no human remains have been found. 

This is a developing story and will be updated.