Listen to the interview with the former Suffolk DA Tom Sini: https://www.newsday.com/long-island/crime/gilgo-beach-murders-suffolk-da-tim-sini-d0caxc8p https://

Listen to the interview with the former Suffolk DA Tom Sini: https://www.newsday.com/long-island/crime/gilgo-beach-murders-suffolk-da-tim-sini-d0caxc8p https://www.newsday.com/long-island/crime/gilgo-beach-murder... Cell phone tower dumps, analyzing these dumps (analytics) to reduce the search space (that is, the number of suspects), new DNA tech, and good old police work helped.