Timeline: Investigating the Long Island serial killings

What began as a search for one missing woman led to multiple bodies and the capture of a man police say is a serial killer . May 1, 2010: Shannan Gilbert disappears Shannan Gilbert , 23, was working as an escort. In the early morning hours of May 1, 2010, Gilbert made a frantic phone call to 911 . She had been at a client's home on Long Island, and said she believed someone was after her. She took off running and told the 911 operator there were people trying to kill her. Then, Gilbert vanished. Police would do an exhaustive search for Gilbert. Months passed without a sign of the missing woman and then, in December 2010, near Gilgo Beach, a police officer and his K-9, Blue, found human remains. But it wasn't Gilbert. Instead, they found the bodies of four women. December 2010: The Gilgo Four The Gilgo Four. From left, Maureen Brainard-Barnes, Amber Costello, Megan Waterman and Melissa Barthelemy. CBS News Police found the bodies of four women near Gilgo Beach on New York's Long Island. The women became known as the Gilgo Four and were identified as Maureen Brainard-Barnes, Amber Costello, Megan Waterman and Melissa Barthelemy. Police say all of the women were petite and three of them were wrapped in burlap. Police began their hunt to find a serial killer. …