New York City police will reveal 911 conversations in the investigation of a cold-case Long Island serial killer.

In 2010, an inquiry into the disappearance of Shannan Gilbert led to the revelation of multiple homicides that were committed by a serial killer.

According to the New York City Department of Criminal Justice, three previously secret 911 calls related to an unsolved serial murder case that took place on Long Island’s Gilgo Beach will be made public on Friday (DCJ).

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On May 1, 2010, an escort named Shannan Gilbert, who was 24 years old at the time, went to the oceanfront property of a customer in Oak Beach, New York, and advertised her services on the website Craigslist. Even though a driver was standing by nearby, she was last seen hurriedly walking away from the location in which she was.

One of the long-distance talks, which lasted for twenty-three minutes, is said to have been placed by Gilbert.