Rex Heuermann: The Gilgo Beach Serial Killer
Overview
Rex Andrew Heuermann was a New York architect who lived in Massapequa Park on Long Island while secretly carrying out a series of murders spanning from 1993 through 2010. His crimes became associated with the Gilgo Beach investigation, one of the most extensive and closely followed serial-murder cases in New York history. For years, the discovery of human remains along Ocean Parkway and in other parts of Suffolk County left investigators and victims’ families with few answers.
Heuermann was arrested on July 13, 2023, after a newly formed task force connected him to several victims through cellphone records, burner-phone activity, witness statements, vehicle information, DNA evidence and other investigative findings. The case continued to expand after his arrest. He was eventually charged with murdering seven women and later admitted responsibility for an eighth killing.
On April 8, 2026, Heuermann pleaded guilty to the murders of Sandra Costilla, Valerie Mack, Jessica Taylor, Maureen Brainard-Barnes, Melissa Barthelemy, Megan Waterman and Amber Costello. During his plea, he also admitted killing Karen Vergata. On June 17, 2026, he was sentenced to three consecutive terms of life imprisonment without the possibility of parole, followed by an additional consecutive sentence of 100 years to life.
Confirmed Victims
- Sandra Costilla: Costilla was 28 years old when Heuermann killed her between November 19 and November 20, 1993. He strangled her and left her body in a wooded area near Fish Cove Road in North Sea, a community in the Town of Southampton, Suffolk County. Two hunters discovered her remains on November 20, 1993. Her case remained unsolved for more than three decades before Heuermann pleaded guilty to her murder.
- Karen Vergata: Vergata was 34 years old when Heuermann killed her in April 1996. Authorities have not established a more precise public date of death. Heuermann admitted that he strangled and dismembered her before leaving her remains in separate locations. Her severed legs were discovered on April 20, 1996, at Blue Point Beach in the Town of Brookhaven. Her skull was found on April 12, 2011, near Tobay Beach along Ocean Parkway. For years she was known as “Fire Island Jane Doe” before genetic genealogy identified her in 2023.
- Valerie Mack: Mack was 24 years old when Heuermann killed her sometime between September 1 and November 19, 2000. The precise date of her death could not be established. He strangled and dismembered her, placing portions of her remains in different locations. Her torso was discovered on November 19, 2000, near Halsey Manor Road in Manorville. Additional remains belonging to Mack were found on April 4, 2011, along Ocean Parkway near Gilgo Beach. She remained unidentified for approximately two decades and was previously known as “Manorville Jane Doe.”
- Jessica Taylor: Taylor was 20 years old when Heuermann killed her between July 21 and July 26, 2003. He strangled and dismembered her before transporting her remains to separate disposal sites. A portion of her body was discovered on July 26, 2003, in a wooded area west of Halsey Manor Road in Manorville. Her head, hands and part of an arm were found on March 29, 2011, along Ocean Parkway east of Gilgo Beach.
- Maureen Brainard-Barnes: Brainard-Barnes was 25 years old when Heuermann killed her on July 9, 2007. He had contacted her after seeing an online advertisement and arranged to meet her. He picked her up, strangled her and restrained her remains with belts before leaving her near Ocean Parkway at Gilgo Beach. Her body was discovered on December 13, 2010, beside the remains of other victims later called the “Gilgo Four.”
- Melissa Barthelemy: Barthelemy was 24 years old when Heuermann killed her on July 10, 2009. He contacted her using a burner telephone after viewing an online advertisement, arranged a meeting and picked her up. He strangled her, bound her remains with tape and burlap and transported her to the north side of Ocean Parkway near Gilgo Beach. Her body was discovered on December 11, 2010. After her disappearance, a person believed to be her killer used her telephone to make cruel and taunting calls to her younger sister.
- Megan Waterman: Waterman was 22 years old when Heuermann killed her on June 6, 2010. Using a burner telephone, he arranged to meet her and picked her up from a Holiday Inn in Hauppauge. He strangled her, secured her remains with tape and burlap and left her along Ocean Parkway near Gilgo Beach. Her body was discovered on December 13, 2010. Waterman was the mother of a young daughter.
- Amber Lynn Costello: Costello was 27 years old when Heuermann killed her on September 2, 2010. An attempted meeting the previous evening had been interrupted by a ruse involving another person at Costello’s residence. Heuermann contacted her again the following day through a burner telephone and picked her up from her home in West Babylon. He strangled her, wrapped and restrained her remains with tape and burlap and transported her to Ocean Parkway. Her body was discovered on December 13, 2010.
The Gilgo Beach Discoveries
The investigation that exposed the scope of the killings began in December 2010 during a search for missing woman Shannan Gilbert. A Suffolk County police officer and a police dog were searching near Ocean Parkway when they found the remains of Melissa Barthelemy on December 11. Over the following days, investigators discovered the bodies of Megan Waterman, Amber Costello and Maureen Brainard-Barnes in the same general area.
The four women became known collectively as the “Gilgo Four.” Their remains had been placed close together along the north side of Ocean Parkway, concealed by thick vegetation. The similarities in the victims, the positioning of their bodies and the materials used to restrain or wrap them led authorities to believe that one killer was responsible.
Expanded searches in 2011 uncovered additional remains along the barrier-island roadway. Some were connected to bodies previously found in Manorville, Blue Point and other parts of Long Island. These discoveries established that the dumping grounds associated with the case extended well beyond the original cluster of four victims.
Heuermann’s Method of Targeting Victims
Heuermann primarily targeted young women who advertised escort or sex-work services. He used prepaid burner telephones, false identities and disposable online accounts to contact them. These methods allowed him to arrange private meetings while limiting the amount of information investigators could immediately trace back to him.
Several victims were picked up from hotels, residences or arranged meeting locations. Heuermann often waited until members of his family were traveling outside New York before committing a murder. Prosecutors said this gave him access to his Massapequa Park home and personal vehicles without the usual presence of his wife and children.
He strangled each of the eight women whose murders he admitted. Some victims were bound or wrapped before being transported to Ocean Parkway. Others were dismembered, with their remains scattered between Manorville, Blue Point Beach and the Gilgo Beach area. The differing disposal methods complicated efforts to recognize that the cases were connected.
Planning and Concealment
Investigators recovered a planning document from an electronic device linked to Heuermann. Prosecutors described it as a detailed blueprint containing notes about preparations, potential problems, methods of controlling victims, cleanup procedures and ways to avoid detection. The document demonstrated that the murders were not impulsive acts but carefully considered crimes.
The notes reportedly addressed subjects such as selecting victims, preparing a location, controlling noise, preventing the transfer of evidence and destroying materials afterward. Heuermann also recorded reminders about changing his behavior and varying his methods. These precautions may have contributed to his ability to avoid arrest for decades.
Heuermann used burner telephones to communicate with victims and, in the Barthelemy case, to place taunting calls. Investigators determined that several relevant telephones moved through areas consistent with Heuermann’s home, office or travel patterns. He often activated the devices only for short periods and attempted to keep them separate from his personal telephone.
The Investigation’s Early Difficulties
The Gilgo Beach case developed slowly despite the discovery of multiple bodies. Several victims remained unidentified for years, and their remains had been deposited in different police jurisdictions. Some had been reported missing in other states, while others had lived transiently or used different names. These circumstances made it difficult for investigators to connect the cases.
The investigation was also affected by changes in leadership and public controversy within Suffolk County law enforcement. Years passed without an arrest, leaving victims’ relatives frustrated and fearful that the killer would never be identified.
Advances in genetic genealogy eventually provided names for victims who had once been known only by labels such as “Fire Island Jane Doe” and “Manorville Jane Doe.” The identifications of Karen Vergata and Valerie Mack helped investigators reconstruct their lives, movements and connections to the larger series of crimes.
The Renewed Task Force
In February 2022, Suffolk County District Attorney Raymond Tierney formed the Gilgo Beach Homicide Task Force. It brought together personnel from the Suffolk County Police Department, the New York State Police, the Suffolk County Sheriff’s Office, the Federal Bureau of Investigation and the district attorney’s office.
Investigators reexamined older reports, witness interviews, telephone records, DNA findings and vehicle information. A major lead involved a dark Chevrolet Avalanche that a witness had reported seeing around the time of Amber Costello’s disappearance. Records connected a similar vehicle to Heuermann.
The task force also reconstructed the movements of numerous burner telephones. Data indicated that phones used to contact victims or their relatives repeatedly appeared in areas associated with Heuermann, including near his Massapequa Park residence and his architectural office in Manhattan.
DNA Evidence
Hair evidence recovered from the victims and the materials surrounding their bodies became a critical part of the investigation. Modern forensic testing allowed investigators to develop genetic profiles that could be compared with Heuermann and members of his household.
Investigators placed Heuermann under surveillance and recovered discarded items that could legally be tested. A pizza crust he threw away in Manhattan provided a DNA sample that was compared with genetic material associated with evidence found on one of the victims. Prosecutors said the resulting match strongly supported their conclusion that Heuermann was the killer.
Other hairs recovered from crime scenes were genetically associated with members of Heuermann’s family. Authorities did not accuse his wife or children of participating in the murders. Instead, prosecutors argued that the hairs had been transferred accidentally through Heuermann’s home, clothing or vehicles before being carried to the disposal sites.
Arrest and Expanding Charges
Heuermann was arrested near his Manhattan office on July 13, 2023. The following day, prosecutors announced charges accusing him of murdering Melissa Barthelemy, Megan Waterman and Amber Costello. He was also publicly identified as the primary suspect in Maureen Brainard-Barnes’ death.
In January 2024, a grand jury charged him with Brainard-Barnes’ murder. Additional investigation connected him to victims whose deaths occurred years before the Gilgo Four. In June 2024, he was charged with murdering Jessica Taylor and Sandra Costilla. In December 2024, prosecutors added the murder of Valerie Mack.
The charges demonstrated that Heuermann’s known crimes extended across approximately 17 years, from the killing of Costilla in 1993 through the murder of Costello in 2010. They also connected him to several disposal sites across Suffolk County rather than only the stretch of Ocean Parkway commonly associated with the Gilgo Beach case.
Searches of His Home and Property
After the arrest, investigators conducted an extensive search of Heuermann’s Massapequa Park residence. Police removed electronic equipment, storage containers, documents, weapons and numerous household items. The home was searched again as investigators developed evidence relating to additional victims.
Authorities also examined his architectural office, vehicles and storage locations. Digital investigators reviewed computers, online accounts, search histories and electronic files. Prosecutors alleged that Heuermann had repeatedly searched for information about the Gilgo Beach investigation, the victims and violent sexual material.
Investigators discovered newspaper articles and publications concerning several of the victims among Heuermann’s possessions. Prosecutors argued that these materials reflected his continuing interest in the crimes and his desire to follow the investigation long after the murders occurred.
Guilty Plea and Admissions
On April 8, 2026, Heuermann appeared in court and pleaded guilty to seven murders. As part of his statement to the court, he described meeting the victims, strangling them and disposing of their remains. He also publicly admitted killing Karen Vergata, although her murder had not been included as a separate count in the indictment.
The plea ended the possibility of a lengthy trial in which prosecutors had planned to present DNA analysis, cellphone records, digital evidence, witness testimony and Heuermann’s alleged planning document. By pleading guilty, he formally accepted responsibility for murdering eight women over nearly two decades.
His admissions resolved questions surrounding several of Long Island’s most enduring cold cases. Families who had waited years for answers finally received an official acknowledgment of who had killed their loved ones, although the plea could not restore the lives that had been taken.
Sentencing
On June 17, 2026, Heuermann was sentenced in Suffolk County Court. Relatives of the victims described the lasting effects of the murders and the pain caused by decades of uncertainty. Their statements emphasized that the victims were mothers, daughters, sisters and friends whose lives were far more significant than the circumstances through which Heuermann encountered them.
The judge imposed three consecutive life sentences without the possibility of parole for the murders of Melissa Barthelemy, Megan Waterman and Amber Costello. Heuermann also received a consecutive sentence totaling 100 years to life for the murders of Maureen Brainard-Barnes, Jessica Taylor, Sandra Costilla and Valerie Mack.
His admission to killing Karen Vergata was included in the plea arrangement even though he did not receive a separate sentence for that murder. The combined punishment ensured that Heuermann would spend the remainder of his life in prison with no possibility of release.
Other Gilgo Beach Victims
Additional victims and unidentified remains have been associated geographically with the wider Gilgo Beach investigation. However, Heuermann has not been officially established as the killer in every death connected to Ocean Parkway or the surrounding areas.
Among the unresolved cases are the deaths of victims known historically as “Peaches,” her young daughter and an unidentified person once referred to as “Asian Doe.” Investigators have continued seeking information about these victims and examining whether their deaths were connected to Heuermann, another offender or unrelated crimes.
Shannan Gilbert, whose disappearance led to the searches that uncovered the Gilgo Four, was found dead in a marsh near Oak Beach in December 2011. Suffolk County authorities have said the evidence indicates that she most likely died accidentally after becoming disoriented and entering the marsh. Heuermann has not been charged with her death, and no verified evidence has established that he killed her.
Legacy of the Case
The Rex Heuermann investigation illustrated how advances in DNA analysis, genetic genealogy and cellphone-location technology can revive cases that have remained unsolved for decades. Evidence that had once been insufficient became meaningful when combined with modern forensic methods and a coordinated review of records from multiple agencies.
The case also drew renewed attention to the treatment of missing and murdered women involved in sex work. Families and advocates argued that assumptions about the victims’ lifestyles contributed to delays in recognizing patterns and devoting sufficient resources to their disappearances.
Heuermann maintained the outward appearance of a successful architect, husband and father while committing calculated murders and closely following the investigations into his crimes. His guilty plea confirmed that the man responsible for at least eight deaths had lived for decades only a short distance from the locations where many of his victims were found.
Although his conviction and sentence provided legal closure, investigators continue examining other unsolved killings for possible connections. The complete extent of Heuermann’s criminal activity may never be known. His confirmed victims remain at the center of the case: eight women whose identities, families and lives were eventually restored to a story once dominated by unidentified remains and unanswered questions.
