Shannon Gilbert was a young woman who went missing in May 2010 while visiting Long Island, New York. She was last seen in the area of Oak Beach, where she was reportedly looking for a friend. Her disappearance led to a significant search effort and raised concerns about safety in the region. In December 2011, her remains were discovered in a nearby marsh, which sparked further investigations into the case. The search for Shannon also uncovered the remains of several other individuals, leading to the investigation of a potential serial killer in the area, known as the Long Island Serial Killer case.