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Gilgo Beach Evidence Timeline

Duct Tape

2000

The remains of Valerie Mack were discovered during this time. Which the duct tape has later been used for DNA testing around 2010.

Paper Towel

2010

Chevrolet Avalanche

2010

911 Recording

2010

Leather Belt

2020

Police Documents

2022

Pizza box

2023

Bounty Paper towels were recovered from investigators at the crime scene of Megan Waterman where years later they were connected to Rex Heuermann.

During this time a witness to the murder of Amber Costello reported a Chevrolet Avalanche outside her house. Whereas to the suspected killer was connected to this car years later.

Shannan Gilbert sent a 911 call the night she had later disappeared. Which had started a massive search with the Police Department to find her. Eventually finding hers and others remains.

The Leather Belt was founded in the original parts of the investigation recovered at the scene of one of the crimes. Later on the belt was reintroduced into the investigation being posted to the public in 2020.

After the case had been renewed Suffolk county had formed a new investigation into the murders. Investigators dug into older pieces of evidence and DNA samples from the crime scenes.

Investigators had been watching over Rex Heuermann where they were able to recover a pizza box found in the trash. The pizza box was sent for DNA testing where they had connected his DNA to another piece of evidence.

Murder Map

Gilgo crime scene map

This map shows a detailed image of where eight out of the ten bodies of the Gilgo Beach Murders were found. Each location helped investigators to recognize patterns in the murders in the cluster shown in the image. This became very important towards the investigation and helps create an understanding for how police were able to find bodies later on.

Katersky, A., & Torres, E. (2020, January 16). Police reveal “significant” evidence in unsolved Gilgo Beach serial killer case. ABC News. https://abcnews.com/US/police-reveal-significant-evidence-unsolved-gilgo-beach-murders/story?id=68326587

Old Evidence and New Technology

Most of the Evidence in the Gilgo Beach Investigation was found in the early years of the search. After the case had been renewed modern technology was put to use on much of the older pieces of evidence to create new leads and findings throughout the case.

Old Evidence

New Technology

  • Hair Recovered from Victims Bodies

  • Duct Tape found on Valerie Mack

  • Leather Belt

  • 911 Recording

  • Advances in DNA Testing

  • Phone Records

  • Surveillance

  • DNA Comparisons

Towards the end of the investigation combining old evidence and newer technologies allowed for break throughs. Serving as the most crucial findings in the search. With connecting DNA samples between evidence, and various forms of media being found.

Shannon Gilbert 911 Recording Audio

Troy Larson. (2022, May 13). Shannan Gilbert 911 call [cleaned] [Video]. YouTube. https://www.youtube.com/watch?v=5fyjQJBFNBg

The original 911 call lasted around 20 minutes as to where you can hear Shannan Gilbert repeatedly say someone is following me. After the phone call she had later disappeared, where as her body was found by investigators.

ScreenRecording_10-05-2026 02-19-19_1.mp4

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