The Cleveland Paranormal Research Society said they heard unexplained whistling and screaming and found other signs of ghosts including shadows and a moving necklace during their March 16 visit to Hill View Manor in New Castle, WEWS-TV, Cleveland, reported Tuesday.
The facility was built in 1926 to house mentally ill and elderly patients. It was closed for financial reasons in 2004.
The investigators said they also captured photos of mysterious "floating mist" inside the building.
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