Full video documenting the Uvalde, Texas school shooting lays bare in devastating detail how police botched the response to the massacre that left 19 kids and two teachers dead.

The footage, released in full by the Austin American-Statesman, depicts upsetting scenes that show cops dilly-dallying in the hallway instead of charging toward 18-year-old gunman Salvador Ramos as he systematically slaughtered 21 people on May 24.

The Statesman published both condensed clips and the full 82-minute video Tuesday, sparking further outrage over cops’ inaction.

The security video footage that was leaked to the newspaper revealed a cop in a helmet and vest using a wall-mounted hand sanitizer and checking his phone as Ramos was inside an unlocked classroom with children.

It also showed officers fleeing down the hallway when Ramos fires in their direction.

The version put on Wednesday visualizes the abject failure of the police in painful detail, showing minute by minute how they continued to fail to stop Ramos despite being within the school’s hallway minutes after Ramos.

It also shows Ramos crashing his truck nearby the school before storming the school.

The chilling video is stitched together across multiple cameras and totals 82 minutes.

Uvalde Mayor Don McLoughlin said Tuesday night following the leak that the Statesmen and TV station KVUE were “chicken” for releasing the video, and a city councilor went further calling the move “chickens–t.”

This is a developing story. Check back for updates.