Megan Waterman was one of the first victims of the Long Island serial killer found by police. In December of 2010, four women - aged 22 to 27, similar in height, weight, hair and eye color - were found dead along a stretch of Ocean Parkway near Gilgo Beach on Long Island, N.Y. They became known as the "Gilgo Four." Now, a decade after Megan Waterman's body was found, her teenage daughter talks for the first time on television with 48 HOURS correspondent Erin Moriarty.