The NYPD’s most decorated detective on surviving America’s deadliest precinct: ‘It would horrify you to see what a human can do to another human’

Ralph Friedman achieved legendary status in the NYPD during his 13 years working the tough streets of the South Bronx in the 1970s and ’80s. After writing a book and making a TV show, the 74-year-old tells Bevan Hurley that one burning ambition remains