15 years after first human remains found, Gilgo Beach killings still haunt LI

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