Suffolk police and other investigators explain what led them to Rex Heuermann, the suspected Long Island serial killer. Get breaking news alerts in the free FOX5NY News app! | Sign up for FOX 5 email newsletters Subscribe to FOX 5 NY: null Watch FOX 5 NY Live: https://www.fox5ny.com/live FOX 5 NY delivers breaking news, live events, investigations, politics, entertainment, business news and local stories from New York City and across the nation. Watch more FOX 5 NY on YouTube: Black Entrepreneurs:    • Playlist   STREET SOLDIERS with LISA EVERS:    • Street Soldiers with Lisa Evers   A.I. ALL IN:    • Playlist   Finding Faith:    • Finding Faith with Sharon Crowley   The Big Idea:    • Playlist