The Shannon Gilbert case involves the mysterious disappearance of Shannon Gilbert, a 24-year-old woman, in May 2010. She was last seen in Oak Beach, New York, after visiting a client. Her disappearance led to a search that uncovered the remains of several other victims, later identified as part of the Long Island Serial Killer investigation. In December 2011, Gilbert's body was found in a nearby marsh, more than a year after she went missing. The circumstances surrounding her death remain unclear, with some suggesting it was accidental while others believe foul play may have been involved. The case continues to draw attention and speculation.