The Long Island serial killer (also referred to as LISK, the Gilgo Beach Killer or the Craigslist Ripper) is an unidentified suspected serial killer who is believed to have murdered 10 to 16 people over a period of nearly 20 years, mostly prostitutes, and left their bodies in areas on the South Shore of Long Island, New York. The victims were found along the Ocean Parkway, near the remote beach towns of Gilgo and Oak Beach in Suffolk County, and the area of Jones Beach State Park in Nassau County. The remains of four victims were found in December 2010, while six more sets of remains were found in March and April 2011. Police believe the latter sets of remains predate the four bodies found in December 2010.On May 9, 2011, authorities surmised that two of the newest sets of remains might be the work of a second killer. On November 29, 2011, the police stated their belief that one person is responsible for all 10 deaths. They also had concluded that the case of Shannan Gilbert, an escort who disappeared before the first set of bodies were found, was not related. "It is clear that the area in and around Gilgo Beach has been used to discard human remains for some period of time," said then-Suffolk County District Attorney Thomas Spota.