Authorities have released images of the person they believe could be the gunman in a mass shooting at Brown University, and they're seeking the public's help identifying the person.

NPR's Leila Fadel speaks with Professor Mahmood Mamdani about his new book, "Slow Poison." The book is a firsthand report on the tragic unraveling of Uganda's struggle for independence.

Rob Reiner's son arrested after his parents' deaths, authorities release images of suspected gunman in Brown University shooting, police say Bondi Beach shooting was inspired by Islamic State group.

New Orleans is the first US city with real-time facial recognition: If you're wanted and walk past one of the system's cameras, it could flag you. The twist: it's a private system, and even though the new mayor and police chief are at odds about facial recognition, this non-profit says it's able to establish its own "guard-rails" as it feeds real-time tips to the police, side-stepping the debate about government regulation and privacy.

The nativity scene in St. Peter's Square comes from a different place every year. For Pope Leo's first Christmas as the pontiff, this year's display comes from Salerno, Italy.

A mass shooting that left 15 people dead at Sydney's Bondi Beach was "a terrorist attack inspired by Islamic State," authorities said Tuesday.

NPR's A Martinez speaks with Australian gun control advocate Rebecca Peters about the aftermath of the Bondi Beach shooting and gun control in Australia.

There's lots of data to show cardiac troubles spike during holidays amid the mix of merrymaking, travel and stress. But there are ways to spot the signs of trouble before it's too late.

Years before his arrest, Nick Reiner had been candid about addiction, recovery, and a film he co-wrote based on his life.

Director Rob Reiner and his wife Michele Singer Reiner died in an apparent homicide. What's next in the investigation? NPR's A Martinez asks former homicide prosecutor Matt Murphy.