The Whole Story with Anderson Cooper

With new, exclusive reporting, CNN Senior Crime and Justice Correspondent Shimon Prokupecz takes an unprecedented look inside the school shooting in Uvalde, Texas, last May as the fight for answers and accountability endures.

A year after the shooting at Robb Elementary School, just a handful of the hundreds of officers who responded have been held accountable. Families who lost everything still don't have a full picture of what happened and how it went so wrong. Without answers from officials in Texas, parents of Robb Elementary students who survived 77 minutes trapped with the gunman asked Prokupecz to show them the moments police finally breached the classroom and rescued their children – raw, never-released body cam footage and 911 audio that authorities refused to make public.

"It's hard to put into words how difficult it has been this past year covering the school shooting in Uvalde," said Prokupecz. "It is, without a doubt, one of the toughest stories I've reported on in my career, and it's been a persistent and somber reminder of the devastating impact that gun violence can have on innocent people and communities. I hope our coverage sheds light on the undeniable work that still needs to be done to better protect children—and adults—from mass shootings, and I am humbled and grateful to the victims' families for allowing us to share their stories."

In this episode, Prokupecz speaks with parents of victims, students who survived, Uvalde Mayor Don McLaughlin,and Texas State Senator Roland Gutierrez. Prokupecz and his reporting team were recently honored with a Peabody Award and a George Polk Award for their groundbreaking reporting in Uvalde.