In December 2015, the FBI joined the investigation.
Why did that collaboration not happen for so many years?
"It didn't happen because of politics. We had a police chief in Suffolk County, as well as a DA, that did not seem open to FBI involvement," recalled Kristin Thorne.
On Jan. 16, 2020, police released photos of a belt imprinted with the letters "H-M" or "M-H" to the public. Police say they believe the belt was handled by the suspect.
Two years later, Suffolk County Police Commissioner Rodney Harrison announced a new task force to investigate the Gilgo Beach murders.
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GILGO BEACH E7: Shannan's chilling 911 call released

The biggest city in America is home to some of the most sinister crimes.

In the new podcast “True Crime NYC,” ABC7 Eyewitness News in New York unravels some of the most ghoulish stories in the Big Apple and exposes the shocking twists and turns.

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A mobster eludes a series of astonishing assassination attempts – until his luck runs out in a fast-food drive-thru lane.

A senior citizen is accused of being a serial killer.

A seaside dumping ground for bodies – and how the alleged serial killer behind it was caught.

People who vanish without a trace – and the pain of loved ones hoping for answers.

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