Gilgo Beach murders update: An investigation timeline of the killings

Starting in 2010, police searching for a missing woman found 10 sets of human remains in the scrub along a barrier island parkway, not far from the sands of Gilgo Beach on Long Island. Police almost immediately feared some were left by a serial killer.

JUMP TO: TIMELINE OF THE INVESTIGATION

Over the years, investigators used DNA analysis and other clues to identify the victims. In some cases, they were able to connect them to remains found elsewhere on Long Island years earlier.

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Gilgo Beach murders update: Rex Heuermann charged with 2 more killings

Rex Heuermann, the alleged Gilgo Beach serial killer, was back in a Suffolk County Courthouse to face additional charges in connection to the case on Long Island. He was charged with the murders of Sandra Costilla and Jessica Taylor.

Investigators concluded that an 11th person found dead — the initial subject of their missing persons search — accidentally drowned.

Prosecutors have charged a Long Island architect, Rex Heuermann, in four slayings, but a majority of the killings remain unsolved. Here's a timeline of the investigation.

Timeline of the investigation

1996

April 20, 1996: The partial remains of Karen Vergata are discovered on Fire Island, a barrier beach off Long Island's southern coast. Her name remains unknown to investigators until 2022, when new DNA analysis helps them make an identification. Vergata, 34, was last in contact with her family on Feb. 14, 1996. She was involved in sex work when she vanished.

1997

June 28, 1997: The partial remains of a woman, nicknamed "Peaches" by investigators after a tattoo on her body, are discovered stuffed inside a plastic tub in a state park in West Hempstead. Her identity remains unknown.

2000

September 2000: The partial skeletal remains of Valerie Mack, who had been working as an escort in Philadelphia, are found in a wooded area in Manorville. Mack, 24, was last seen by her family in the spring or summer of that year in Port Republic, New Jersey.

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2003

July 26, 2003: The partial skeletal remains of Jessica Taylor are discovered in a wooded area of Manorville. She was 20 when she vanished and had been an escort working in NYC.

Courtesy of Jessica Taylor’s family

2007

July 9, 2007: Maureen Brainard-Barnes, 25, who had traveled to New York City from her home in Norwich, Connecticut, for sex work, is last heard from by a friend. She says she is leaving her hotel to meet a client. Investigators later say cellphone records showed her phone was last used on Long Island.

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Courtesy of Maureen Brainard-Barnes's family

2009

July 10, 2009: Melissa Barthelemy, a 24-year-old sex worker, is last seen at her apartment in the Bronx. She tells a friend she is going to see a man and would be back in the morning. Cellphone location data puts her phone's last known location on Long Island.

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Courtesy of Melissa Barthelemy's family

July 17, 2009: A man begins using Barthelemy’s mobile phone to make taunting phone calls to her relatives. There are additional calls on July 23, Aug. 5, Aug. 19 and Aug. 26. In one, a man says he killed her.

2010

May 1, 2010: Shannan Gilbert, a sex worker, disappears in the barrier island community of Oak Beach after fleeing the house of a client and banging on a neighbor’s door. In a recorded 911 call, she tells a dispatcher people are after her, but she can also be heard refusing offers of help. Her pimp, the client and his neighbor all tell police she appeared disoriented and ran into the night on her own.

A picture of Shannan Gilbert.

June 6, 2010: Megan Waterman, 22, who had traveled to Long Island from Maine for sex work, is last seen at a motel in Hauppauge.

Megan Waterman

Sept. 2, 2010: Amber Lynn Costello, 27, is last seen leaving her home in West Babylon to meet with a sex-work client. A male friend later tells investigators he noticed a Chevrolet Avalanche, presumably driven by the client.

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Courtesy of Amber Lynn Costello's family

December 11, 2010: A police officer and his dog discover Barthelemy's remains while conducting a training exercise along Ocean Parkway.

Dec. 13, 2010: Police find the bodies of Costello, Brainard-Barnes and Waterman on the same quarter-mile stretch of Ocean Parkway where Barthelemy’s remains were located.

Dec. 14, 2010: Suffolk County Police Commissioner Richard Dormer publicly announces the discovery of the bodies and says a serial killer might be to blame. Police expand the search, looking for additional remains or for any sign of Gilbert.

2011

March 29, 2011: Some of Taylor’s remains are discovered along Ocean Parkway.

April 4, 2011: Additional remains of Valerie Mack are found along Ocean Parkway. Near those remains, investigators also find the remains of an unidentified female toddler, later identified through DNA as the daughter of "Peaches." Elsewhere on the parkway, investigators discover the remains of an Asian male. Investigators estimate he died 5-10 years earlier and was in his late teens or early 20s. He still has not been identified.

SCPD composite sketch of unidentified Asian male

April 11, 2011: Additional remains of Vergata are discovered along Ocean Parkway, several miles west of Gilgo Beach. Police also find remains belonging to "Peaches" along the beach parkway.

Dec. 13, 2011: Gilbert’s skeletal remains are discovered in a tidal marsh near Oak Beach. After an autopsy and further investigation, Suffolk Police say she most likely accidentally drowned. Her family still suspects she was murdered. One expert hired by the family said it was possible her death was a homicide.

2022

January 2022: The Suffolk County district attorney convenes a new task force to investigate the Gilgo Beach slayings.

2023

July 13, 2023: Investigators arrest Heuermann and charge him with murdering Costello, Waterman and Barthelemy. They say they also believe he killed Brainard-Barnes, but do not initially charge him with her slaying.

2024

Jan. 16, 2024: Heuermann is charged in the death of Brainard-Barnes. Prosecutors say a hair found with her corpse is genetically similar to a DNA sample from Heuermann's wife.

Late April 2024: Police conduct a new, multiday search of a wooded area in Manorville where Taylor and Mack's remains were discovered more than a decade earlier.

May 20, 2024: Investigators launch a new search of Heuermann's home. It lasts nearly a week.

The Associated Press wire services helped contribute to this report.