An officer walks outside of Robb Elementary School in Uvalde, Texas, on May 24.
Mandatory Credit:	Allison Dinner/AFP/Getty Images

An officer walks outside of Robb Elementary School in Uvalde, Texas, on May 24.
Mandatory Credit: Allison Dinner/AFP/Getty Images

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Chairman of Texas House Committee investigating Uvalde school shooting pushes for release of hallway surveillance video

The chairman of the Texas House committee investigating the Uvalde school shooting pushed to release hallway surveillance video that shows what police were doing as a gunman remained inside adjoining classrooms for about 77 minutes.