Board of Regents Chancellor Merryl H. Tisch, right, listens as...

Board of Regents Chancellor Merryl H. Tisch, right, listens as a question is asked of New York State Education Commissioner Dr. John B. King, Jr. during a presentation of the Regents Common Core Work Group report to the Board of Regents in Albany on Feb. 10, 2014. Credit: Philip Kamrass

What began as a desperate hunt for Shannan Gilbert in the marshes near Gilgo Beach became, in three astonishing days in December 2010, the unmasking of a possible serial killer. NewsdayTV's Doug Geed has more.  Credit: Newsday/A. J. Singh; File Footage; Photo Credit: SCPD

'We had absolutely no idea what happened to her' What began as a desperate hunt for Shannan Gilbert in the marshes near Gilgo Beach became, in three astonishing days in December 2010, the unmasking of a possible serial killer. NewsdayTV's Doug Geed has more.

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