Shannan Gilbert's disappearance in 2010 sparked the discovery of 11 bodies on and near Gilgo Beach on Long Island.

"One of the most significant things I've ever heard at any kind of public official say, I think it was the first full day after that first report that we did," recalled Einiger. "There was a press conference with the man who was then the police commissioner. And he said something that to this day, I remember everything about what he said and how he said it."

Make sure you follow our podcast -- chapter 3 of Eyewitness to Gilgo Beach drops Thursday, Feb. 1.

Learn more about your ad choices. Visit podcastchoices.com/adchoices