The Gilgo Beach Murders Were a Cold Case. Then a New Police Chief Arrived.. Serial Murders, Sex Crimes, Forensic Science, Genealogy, Gilgo Beach (NY), Long Island (NY), Hart, Geraldine (1967- ), Police Department (Suffolk County, NY), Federal Bureau of Investigation, DNA (Deoxyribonucleic Acid), Genetics and Heredity, Corruption (Institutional)