Watch: Shocking timeline of changing claims from Texas law enforcement
Tears outside the Willie de Leon Civic Center in Uvalde, Texas after a gunman killed 19 small kids and two teachers at an elementary school(AFP)

Ali Velshi held up a dark front page of the Uvalde Leader-News as he began anchoring MSNBC "Prime" from Texas on the dramatically shifting official accounts of the mass shooting at Robb Elementary School on Tuesday.

"In the aftermath of any horrific event, information is spotty. Our understanding of what happens evolves over time, but even by those standards of breaking, and developing news, the inability of officials to give a consistent, and coherent account of a key portion of the timeline of attack is, frankly, confounding," Velshi reported.

He noted multiple official statements on whether an armed school resource officer engaged the gunman. And played two videos purported to show officers clashing with parents outside the school.

Velshi explained why examining law enforcement's response is important.

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"Look, the point in raising all these questions about the law enforcement response is certainly not to pick on officers who may well have been very brave and doing their best in an unbelievably stressful and highly threatening situation," he said.

"But, law enforcement — more and more law enforcement — is really the only response to school shootings that have been proposed or allowed by the Republican officials who run the state of Texas," he noted. "After the Santa Fe High School shooting in Texas in 2018, the state passed multiple bills to, 'harden schools.' The Uvalde school district doubled its security budget, it created its own police force and threat assessment teams at each school."

If that is the only answer that Texas has to the scourge of school shootings, — not to prevent them, but to guard and respond to schools better when they happen — well, they've got to show that plan works," Velshi said. "And tonight the people of Uvalde have a lot of questions about how well it worked."

Watch the clip below or at this link.