In early 1972, Nancy Anderson was a 19-year-old who had been living in Hawaii for less than a year after graduating high school. On January 7, 1972, Anderson was found dead in her Waikiki apartment. She had been stabbed more than 60 times. Police spent 50 years trying to solve her murder, reopening the case numerous times and coming up with new suspects, the New York Post reported. Authorities spoke to a pair of door-to-door knife salesmen who had visited Anderson’s home just hours before her murder, along with former boyfriends and the apartment building’s property manager – but all...