PHILADELPHIA — The signs were chilling — and hiding in plain sight.

Neighbors of the Philadelphia house of bizarre horrors tied to the disappearance of at least two women describe the current owner as a “psycho’’ who helped turn the once-quaint townhouse into an eyesore with boarded up windows, bars on the doors and security cameras.

The father of current owner Eugene Horsch was even more sinister. RC Horsch, who died last year, was an infamous photographer whose work allegedly deviated into predatory pornography.

R.C. Horsch bragged about his checkered past — and penchant for sadomasochistic porn — on his own web site before his death in 2025. U.S. Marshal

Creepy convicted drug felon Eugene would lurk in a back shed “doing I don’t know what,” said neighbor Yana Smith, 50, to The Post.

Smith said her husband once got into an argument with the 44-year-old — who lived in the Olney home with his sadist smut-peddling dad — when Horsch tried to point a security camera at their bathroom window.

The guy gave off “psycho’’ vibes, Smith said.

Eugene is now being eyed in the missing women’s disappearance — but has claimed to cops that they should be looking at his father R.C. Horsch, who was in his early 80s when he died last year, law-enforcement sources have told The Post.

Eugene said his father — who boasted on his website about photographing “scantily clad women in sadomasochistic settings” — was the one behind the disappearance of the R.C.’s much younger ex-wife Amy McHale and another woman, according to sources.

The son came on the radar of authorities June 19 when a US Park Ranger overheard his girlfriend say, “You’re going to hurt me,’’ while the pair was sitting in a parked car near Independence Hall.

R.C.’s son Eugene Horsch, 44, says his dad is two blame for two women’s disappearance. Philadelphia Police Department

Eugene was discovered carrying a fake Drug Enforcement Administration badge, a switchblade and two guns with “obliterated serial numbers.’’

His girlfriend had a fake ID on her — with a name belonging to Blair Tonzelli, who went missing in Kensington in 2023 when she was 35, according to police documents viewed by the Inquirer. Tonzelli had worked as a home healthcare aide at the Horsch home and had a dispute over money with Eugene, a friend allegedly told police.

Eugene had given his girlfriend the bogus identification with Tonzelli’s name, police said.

The Horsch family’s dilapidated Philly home was replete with boarded up windows and security cameras. Jessica Griffin/The Philadelphia Inquirer via AP

A police raid of the Horsch home later turned up vats of chemicals, drugs, firearms, urns of human ash and a handwritten letter referencing infamous 1970s serial killer Ted Bundy, Philadelphia Police Deputy Commissioner Frank Vanore said last week.

Police are still conducting testing on the 55-gallon drums and other suspicious items found in the home — as well as searching local sewers —for potential DNA traces of the missing women.

Amy McHale, RC’s ex-wife, last seen at the home before vanishing in 2016. Facebook/Have you seen Amy Mchale

The house was the last known location of R.C.’s ex-wife Amy McHale, who vanished without a trace in 2016.

Eugene has denied having anything to do with the women’s disappearance.

An FBI agent transports evidence from the house of horrors. Anadolu via Getty Images An investigator in a hazmat suit helps with the probe. Anadolu via Getty Images

“This is much ado about nothing. … They’re barking up the wrong tree,” Eugene’s lawyer, Jerome Brown, told the Philadelphia Inquirer.

The dad was a photographer, indie filmmaker, porn actor, and “fugitive, sociopath, ex-convict and all-out villain,” according to the bio page on his own web site.

R.C. bragged about his own criminal history that included forging art, going AWOL from the army and growing illegal pot.

The dad and McHale met in the 1990s — when she was in her 20s and he was in his 50s — and later got married and divorced.

But they stayed close even after their relationship ended, said Amy’s daughter, Amanda Stofer, to the Inquirer — possibly because RC kept giving her drugs.

An investigator carts off potential evidence from the home. Kyle Mazza/Shutterstock

“I’m sure it had something to do with the drugs and alcohol. I think he enabled her with things that weren’t really permitted in my grandmother’s house,” Stofer told the outlet.

McHale, then 44, visited RC the house before she dropped off the map.

Though Eugene has denied having anything to do with the missing women, he did follow in his dad’s felonious footsteps with a 10-arrest rap sheet that included drug possession and dealing, assault and drunken driving, according to the Inquirer.

The raid of his home turned up several other fake IDs, plus fake law enforcement badges.

Eugene Horsch does not face any charges in connection with the missing women.