The daughter of accused Gilgo Beach serial killer Rex A. Heuermann says her father "most likely" committed the killings in an explosive new documentary that premiered on Peacock on Tuesday morning.

Victoria Heuermann, 28, who along with her mother, Asa Ellerup, was reportedly paid more than $1 million to tell their story in "The Gilgo Beach Killer: House of Secrets," shared the startling allegation with the filmmakers last week, they reveal in the closing moments of the three-part series.

"A week before the series release, Victoria Heuermann told the producers that based on publicly available facts that have been presented and explained to her, she now believes her father is most likely the Gilgo Beach killer," reads a slide that appears in the closing montage.

The moment comes after Heuermann, who still lives in the family’s Massapequa Park home, spends portions of the final episode grappling with the idea that her father, who is charged in the gruesome deaths of seven women, may have been a killer. She says she’s "on the fence" about whether or not he is guilty of the crimes he is accused of earlier in the series.

There were "vacations that he did not join us on," Heuermann said. "And that's exactly what I mean by on the fence. ... He was definitely very much around 90% of the time. There's another 10% of time he was not."

Attorney Robert Macedonio, who represents Heuermann and Ellerup, said Heuermann called the producers herself because she "wanted to clarify her position."

"She started processing everything in her own mind," Macedonio said. "She has her own opinion, separate and apart from her mother. She's a young lady, educated, and she's starting to process this faster than her mother is."

Macedonio said neither Ellerup nor her children watched the documentary before its release, but will likely view it now that it is available to the public. He said they did not have any say in the editing process.

The goal of the series was to show the family on their journey "from the arrest to where we are now," the attorney said.

"Nobody could picture what their family would be like going through this," Macedonio said.

Heuermann says in the series that she’s only visited her father in jail once. He acted the same as he did before his arrest, she recalled. The daughter ultimately believes that if her father is convicted she will have a "love-hate" relationship with him moving forward.

"I love him as my dad," she tells the interviewer. "The hate is this other side of him that came out."

Michael J. Brown, Rex Heuermann's attorney, declined to comment about the documentary, which he said he had not viewed.

A series of shocking moments

The daughter’s assertions are among several shocking moments in the series, produced by rapper and mogul Curtis "50 Cent" Jackson and the New York Post, which also features a brief and surprising voice cameo from the accused killer himself.

The documentarians filmed as Ellerup receives a call Rex Heuermann placed from the Suffolk County jail in Riverhead, offering a rare chance for the public to hear him speak.

Heuermann talks about what he ate for dinner that night — a burger and mashed potatoes — and how he planned to spend the following day.

"I’ll try to get out and take a walk," he says.

Some courtroom evidence that has not before been publicly revealed also makes its way into the series, including new information that Heuermann suddenly remodeled the bathroom in his Massapequa Park home days after the disappearance of alleged victim Melissa Barthelemy in 2009.

Ellerup said she was on a five-week vacation with her children in her native Iceland when Heuermann called her with the news that summer.

"He said to me, 'made a big mess, and I have a big surprise for you when you get home,' " Ellerup reveals in the second episode. "He told me he had ripped apart the whole bathroom and he threw everything out."

'A problem solver'

Ellerup, who divorced Heuermann after his 2023 arrest but maintains throughout the documentary that she believes he is innocent, said the bathroom was redone "from top to bottom" and he also installed a sink and toilet in the basement and redid the plumbing.

"That was Rex," Ellerup says. "He’s a problem solver."

Asa Ellerup appears on "The Gilgo Beach Killer: House of Secrets" documentary on Peacock.

A receipt shown in the documentary reveals Heuermann, a 61-year-old architect, purchased the plumbing supplies on July 12, 2009, two days after prosecutors say his family left for Iceland on the same day Barthelemy was last seen alive. Additional supplies were bought at Home Depot on Aug. 6, according to another receipt.

Suffolk County District Attorney Ray Tierney has said Heuermann joined his family in Iceland for one week beginning Aug. 10. He declined to comment on the documentary, which he had not yet seen as of Monday.

The bombshell revelation about the bathroom supports speculation about why investigators were so focused on the bathroom and basement of the First Avenue home while executing search warrants in July 2023, and again in May 2024. Ellerup, 61, shows on camera how the renovated bathroom was torn up by Suffolk police detectives removing sections of the tub and cutting below the tile and into the floor below.

Heuermann's family life

New details of Ellerup and Heuermann’s relationship also come to the light in the series, as she tells the filmmakers they met when she was 18 years old and working at a Long Island 7-Eleven. Both later married other people, but maintained a friendship for years. When Ellerup’s first marriage dissolved, Heuermann invited Ellerup and her son, Christopher Sheridan, now 35, to live in the family’s current home and paid for her divorce. They married in 1996.

A photo from Rex A. Heuermann and Asa Ellerup's 1996 wedding, shown in the new Peacock documentary.

Wedding photos are among the never-before-seen images shared in the series along with shots of Heuermann as a child and young man. One image said to be taken by Heuermann himself is of buried bones discovered on an archaeological dig.

Footage in the documentary also shows Heuermann’s notorious basement gun vault. In one scene, Ellerup attorney Macedonio, of Islip Terrace, walks the family through court documents and shows them the area outside the vault where investigators believe Heuermann tortured and killed his victims.

A best friend

Port Washington architect David Jimenez, a former Glen Cove building department director, is revealed in the documentary to be the accused killer’s "best friend" and the one person outside of family and clergy to visit him in jail.

Accused Gilgo Beach serial killer Rex A. Heuermann photograph appears on new Peacock documentary.

Jimenez says the two men bonded over their love of guns, conservative politics, "scotch, cigars, all the macho stuff." He also shares a story about a scary turn their friendship once took.

Jimenez said they were shooting together at a gun range when he "made the mistake" of cocking a gun while Heuermann was down range collecting targets.

"He pulled out his gun and started running toward me," Jimenez said, showing how Heuermann held his pistol close to Jimenez's head before he was able to calm him down.

'He started crying'

Jimenez is the one interview subject in the documentary to reveal Heuermann’s reaction when he asked during a visit to the jail if he killed the women at Gilgo Beach.

"He started crying," Jimenez said, adding that Heuermann hung his head and never answered the question. "And that’s when I get the feeling, that I think he did it."

Suffolk County Sheriff Errol D. Toulon Jr. and Nassau County Police Commissioner Patrick Ryder are among the interview subjects in the series.

Heuermann has been incarcerated at the Suffolk County jail in Riverhead since his initial arraignment on July 14, 2023. He is charged with murder in the deaths of Barthelemy, Megan Waterman, Amber Lynn Costello, Maureen Brainard-Barnes, Jessica Taylor and Valerie Mack, whose remains were all found at Gilgo Beach, as well as Sandra Costilla, whose body was discovered more than 65 miles away in the Southampton hamlet of North Sea.

Partial remains of Taylor and Mack were also found in wooded areas north of the Long Island Expressway in Manorville. The killings occurred between November 1993 and September 2010.

Heuermann is due back in court June 17 for a continuation of a suppression hearing regarding DNA evidence in the case. The defense will call its first witness on that date, a court spokesperson said following his most recent court date in April.

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