The Texas Tribune, Frontline and Futuro Investigates collaborated on a documentary about last year’s school shooting in Uvalde. “After Uvalde: Guns, Grief & Texas Politics” premiered Tuesday on PBS stations nationally.

The documentary follows journalist María Hinojosa as she examines the aftermath of the deadliest school shooting in Texas history. Tribune reporter Zach Despart tells how officers on the scene knew their gear wouldn’t protect them against an AR-15.