In Part 3 of our series on schools and gun violence, audio producer Sabby Robinson chronicles the tragic outcome of Huguenot High School’s graduation – which was supposed to mark a moment of cathartic celebration for the school but ended in gunfire.

Deep Reads: The librarian who couldn’t take it anymore

Post Reports is the daily podcast from The Washington Post. Unparalleled reporting. Expert insight. Clear analysis. Everything you’ve come to expect from the newsroom of The Post, for your ears. Martine Powers and Elahe Izadi are your hosts, asking the questions you didn’t know you wanted answered. Published weekdays around 5 p.m. Eastern time.