Long Island serial killings: A timeline of the investigation

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. 

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.