Follow NYPD detectives as they take you behind the scenes of New York City's most notorious criminal cases.

Each episode revisits cases that once seemed impossible to crack, from cold cases to investigations that took unexpected turns.

In Season 4, "Stories from ESU," some of NYPD's most highly-trained officers recount life or death emergencies as they risk everything to keep New Yorkers safe.

This podcast is supported by the independent nonprofit New York City Police Foundation, and is written and produced by Jill Bauerle and Kenzie De Laine II. The podcast’s narrator, retired Detective Sergeant Wally Zeins, served at the NYPD from 1973 to 2003.