A new Netflix docuseries that dropped Monday centers on Rex Heuermann, accused of being the Long Island Serial Killer.

“Gone Girls: The Long Island Serial Killer” chronicles the string of slayings known as the Gilgo Beach murders in which seven women in their early 20s, working as sex workers, disappeared between 1993 and 2010.

Heuermann was arrested in 2023 and has been charged with seven murders. He has pleaded not guilty.

The three-episode true crime series features interviews with Heuermann’s friends and family and details how law enforcement arrested the 61-year-old architect, who is currently facing trial in New York. Heuermann is incarcerated at the Riverhead Correctional Facility in Suffolk County.

In an interview with Netflix, Director Liz Garbus discussed the intricacy of chronicling a live case, adding that Heuermann was charged with another murder after she had already submitted the documentary.

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“Will there be more between now and the time that we air? It’s possible. Will there be more between now and the time that we go to trial, if they go to trial? It’s probable,” Garbus said.

USA TODAY reached out to Heuermann’s attorney late Tuesday for comment.

While the docuseries details the crimes and the investigation leading up to Heuermann’s arrest, the case continues to unfold in real time. Here’s what to know.

Who are the 7 victims in the Gilgo Beach murders?

In July 2023, Heuermann was arrested and charged with murder in connection with the deaths of Megan Waterman, 22; Melissa Barthelemy, 24; and Amber Costello, 27.

Last year, he was also charged in the four additional murders of Maureen Brainard-Barnes, 25; Jessica Taylor, 20; Sandra Costilla, 28; and Valerie Mack, 24.

Judge to decide whether case should be broken up into multiple trials

Heuermann’s defense team has petitioned for the court not to tie the seven murders together in one trial, arguing that combining the cases could lead to an improper conviction. Through a motion, his legal team told Judge Timothy Mazzei that the evidence in some of the deaths are weaker than others.

However, the Suffolk County District Attorney Office has pushed back against this effort, arguing in a statement that the victims are “inextricably interwoven by geographic proximity, victimology, digital and physical evidence, forensic analysis, and defendant’s own planning document.”

Mazzei is expected to make a ruling on how the killings will be tried in court soon.

Defense seeks to exclude certain DNA evidence

Heuermann’s legal team has also petitioned Mazzei to exclude some evidence from trial due to the type of DNA testing used known as nuclear DNA, or whole genome sequencing. The technology examines the complete DNA make-up of an organism with greater precision, according to the U.S. Food and Drug Administration.

However, Heuermann’s attorneys argue the technique is not widely accepted by the scientific community and highlights the fact that it has never been used in New York court of law.

Prosecutors have countered, arguing the technique is used in a wide variety of scientific and forensic settings.

“The advancement of forensic science and nuclear DNA analysis involving Whole Genome Sequencing has allowed law enforcement to now link genetic profiles consistent with the defendant, and/or individuals who have resided with him, to six of the seven victims through hairs found at the crime scene and/or on the victims,” Assistant District Attorney Andrew Lee said, according to ABC News.

Has a trial date been set?

A trial date for the murder charges against Heuermann has not been set, as Judge Mazzei must determine whether nuclear DNA evidence can be used and whether the seven killings will be tried together.

Proceedings will continue on Wednesday, April 2, when more experts will testify.

Is Rex Heuermann divorced?

Heuermann has reached a divorce settlement with his estranged wife, Asa Ellerup, who filed for divorce in July 2023 shortly after his arrest, ABC News reported.

A judge will review the terms of the settlement, which are not public, and decide whether to finalize, per ABC News.

How to watch the Gilgo Beach murders documentary

All three episodes of the true crime docuseries “Gone Girls: The Long Island Serial Killer” are available to stream on Netflix.