Co-worker: Gilgo murders suspect unnerved her by tracking her down on a cruise

Exclusive details about the NYC architect accused of being the Long Island serial killer, his life and how he may have been hiding in plain sight for more than a decade. This story previously aired on June 15, 2024.It was updated on April 12, 2025. Not far from a quiet stretch of Gilgo Beach on Long Island, New York, investigators uncovered the hidden remains of four young women. The mystery of who they were and how they got here might have stayed a secret if not for a woman named Shannan Gilbert. In the early morning hours of May 1, 2010, 23-year-old Shannan Gilbert, working as an escort, called 911. The call came from a neighborhood not far from Gilgo Beach.

SHANNAN GILBERT (to 911): These people are trying to kill me. Dominick Varrone: K-9 … searched the area … exhaustively for Shannan Gilbert. Dominick Varrone was chief of detectives at the Suffolk County Police Department. Months passed without a sign of the missing woman. Then, in December 2010 near Gilgo Beach, a police officer and his K-9 named Blue found human remains. But it wasn't Shannan. Stunned searchers would go on to discover the remains of four other women. The women were identified as Maureen Brainard-Barnes, Melissa Barthelemy, Megan Waterman and Amber Costello. Like Shannan, all were in their