The spouse of alleged Gilgo Beach murderer Rex Heuermann was observed for the first time entering a supposed ‘kill room’ located in the basement of their residence in Massapequa Park.

The Peacock docuseries titled ‘The Gilgo Beach Killer: House of Secrets’ offers an uncommon glimpse into the secret chamber within the gun vault, where Heuermann is said to have kept nearly 280 firearms.

Footage depicts Asa Ellerup, aged 61, entering the wood-paneled chamber, which contains Heuermann’s garments and includes a secured safe, adorned with a cautionary sticker reading: ‘Explosives Inside. Do Not Attempt to Drill or Torch this Site.’

‘He didn’t want anyone to have access to [the secret room] so nobody would know –  not because he was hiding anything. It was because he wanted to secure a safe in there,’ Ellerup says.

Her daughter, Victoria Heuermann, 29, notes it is the secret room that everyone wants to talk about. ‘It is kind of a walk-in closet in the gun room that is actually underneath the stairs.

‘I actually didn’t see what the inside looked like until after this happened. I wouldn’t go in there myself,’ she adds.

The 61-year-old architect was arrested in July 2023 for the alleged murders of three young women. He has been linked to four other killings, bringing the total to seven.

As Victoria reveals in the docuseries that premiered on June 10: ‘A lot of media are calling the vault “the kill room”. That is where he stored all his guns.

‘As a kid, he showed them to me and did teach me to use a gun when I was old enough but the vault was always locked,’ she recalls.

‘The only time I was in there was when he was in there.’ 

In the clip, Ellerup shows where her ex-husband kept his guns along the wall, which now stands bare. ‘The steel door has a combination lock. The lever here is an easy way out so no one can get locked in here,’ she explains.

David Jimenez, 63, a longtime friend of Heuermann who went to the gun range with him, recounts the moment he was invited into the basement to see the ‘the famous gun room’.

‘I recalled vividly he [Rex] said: “In 30 years, you are the fourth person to ever be in this room.” I was like: “Wow.” That is when he showed me his collection,’ Jimenez said. ‘He started collecting rifles and all sorts of guns at 18. It was an amazing collection.’ 

The whole cache was seized during one of the search warrants, and the steel door housing the gun vault that bears the initials ‘RAH’ – ‘Rex Andrew Heuermann’ – was removed from the property in May.

It remains unclear what investigators found in the secret room. Details are not expected to be disclosed until the trial begins.

Victoria talks of her childhood admiration for her father, and shows a wooden dollhouse he had built as a gift. 

Several photos appear in the episode showing her with Heuermann.  

At one point, she discusses her parents divorce that was finalized in April. 

‘They did this divorce to protect the assets. It is now legally her house. If we lost the house we would be homeless. It’s our house but it doesn’t mean we are not a family any more,’ she says.

The docuseries also features Ellerup talking about her first marriage and her son Christopher, whom she had before meeting Heuermann.

At the time, she was working at 7-Eleven, while Heuermann was in college.

‘I love tall, dark and handsome,’ she says. ‘I was madly in love with him.’ 

Heuermann has lived in the home in Massapequa Park his whole life, with Ellerup moving in when the couple wed in 1995.

Paging through old photo albums, she shows pictures of a younger, thinner Heuermann smiling in a wedding photograph and as a young father.

But the recurring theme in the three-part docuseries is how his wife of 27 years could not have known anything about Heuermann’s alleged double life. 

‘Rex was not seeing prostitutes. He was a family man,’ Ellerup insists. ‘He didn’t do it.

‘I would need to hear if from Rex, face to face, that he killed these girls for me to believe it,’ she says.

Ellerup and her attorney, Robert Macedonio, have attended all of Heuermann’s court hearings, sometimes with Victoria.

In one clip, Ellerup is seen applying makeup before setting off for the court.

‘My husband never kept me out of anything,’ she says. ‘That is why I am going to the courthouse. That is why. I want to see it for myself. It is important for me to know what he is going through and I want to be a part of it.’  

Another scene shows a smiling Ellerup in her attorney’s office saying how much she liked having been able to watch Heuermann in court. ‘It was comforting,’ she says.

‘I just don’t see him that way. No. That is not the Rex I know.’

Heuermann is now charged with the murders of seven women during a two-decade reign of horror from 1993 to 2011.

All the victims were sex workers who vanished before their remains were found along Ocean Parkway near Gilgo Beach as well as other remote spots on Long Island.

Since his arrest, prosecutors have unveiled a trove of evidence, including hairs allegedly belonging to Heuermann and his family members found on some of the victims, cellphone data allegedly placing him in contact with them, and a chilling ‘planning document’ in which he allegedly outlines his killings in detail.

He has pleaded not guilty to all charges. 

Fears that a serial killer or killers were operating on Long Island began in May 2010 when 24-year-old sex worker Shannan Gilbert disappeared in strange circumstances one night.

During a search for Gilbert that December, officers found the body of Melissa Barthelemy, 22, in the marshes by Gilgo Beach.

Within days, three more bodies – Amber Costello, 27, Maureen Brainard-Barnes, 25, and Megan Waterman, 22 – had been found. They became known as the Gilgo Four.

The women had been dumped within a quarter-mile of each other, some bound and wrapped in burlap.

Over the following months, the remains of seven other victims were found.

‘The Gilgo Beach Killer: House of Secrets’ is a three-part docuseries that premiered on June 10, 2025, and all episodes are now available to stream exclusively on Peacock