The May 2022 gun massacre at Robb Elementary School in Uvalde, Texas left 19 children and two teachers dead. It was one of the deadliest school shootings in U.S. history. Inside the Uvalde Response, a recent documentary from FRONTLINE, ProPublica and The Texas Tribune, probes the chaotic police response to the shooting and sheds new light on law enforcement’s thoughts and actions as the tragedy unfolded. Among the revelations: Students and teachers at the school had practiced active shooter drills and knew what to do, but scores of law enforcement officers who responded that day did not. Lomi Kriel, a reporter with the ProPublica-Texas Tribune Investigative Unit, and director Juanita Ceballos join The FRONTLINE Dispatch to discuss how they used hundreds of hours of body cam footage and officer interviews to reconstruct one of the most criticized mass shooting responses in recent history, and examine what went wrong. “I think one thing that makes this very different is that for prior mass shootings — Parkland, Pulse, others — we just don't necessarily… have this kind of information, both body camera footage, 911 calls, interviews with officers — to actually know how those responses happened.” Kriel says that while the Uvalde community awaits fuller answers from the district attorney investigating the law enforcement response, FRONTLINE, ProPublica and The Texas Tribune’s  reporting provides at least “one comprehensive accounting of what happened that day” You can watch Inside the Uvalde Response on FRONTLINE’s website, FRONTLINE’s YouTube Channel, and the PBS App. Want to be notified every time a new podcast episode drops? Sign up for The FRONTLINE Dispatch newsletter.