City on edge as police comb home of Raymond Horsch, pornographer who died last year, in grisly case involving disturbing pictures and film

A dilapidated house, burned out above the second story, may hold clues to dark tales and – potentially – the darkest of endings as the FBI and police in Philadelphia try to unpick what took place at 417 West Chew Avenue for more than three decades.

Last week, homicide investigators shifted their focus from examining an archive of a million photographs and film recovered from what is known locally as the “house of horrors” to excavating what is in or under the home of Raymond “RC” Horsch, a career criminal, local artist, author and snuff photographer who died last year aged 82, and his son Eugene, 44.