Shannan Gilbert , 24 , of Jersey City , New Jersey met with one final John in May 2010 before she disappeared for good . The last time anyone saw her alive was on June 30, 2010, when a friend called 911 to report that Shannon had not returned home from work and police were looking for her. Gilbert 's mother and some experts believe her death came at the hands of Long Island 's elusive Gilgo Beach Craigslist killer . However , police disagree and saw Gilbert died after fleeing the home of her last customer and possibly drowning in a nearby marsh .
Shannan Gilbert , 24 , of Jersey City , New Jersey met with one final John in May 2010 before she disappeared for good . Police searched for over a year for the sex worker 's body and in doing so uncovered a mass grave for some 10 other slain prostitutes 3 miles away . Gilbert 's mother and some experts believe her death came at the hands of Long Island 's elusive Gilgo Beach Craigslist killer . However , police disagree and saw Gilbert died after fleeing the home of her last customer and possibly drowning in a nearby marsh .