More questions, still no answers in Uvalde mass shooting

There's still no explanation on why the shooter who murdered 19 children and two teachers was inside Robb Elementary school as long as 60 minutes before law enforcement took him out. We learned this morning he entered the school unimpeded. There was no lock on the door. We also learned there was an exchange of gunfire as the murderer made his way from his car toward the school that left two cops wounded. Our on-the-scene coverage today begins with CNN's Shimon Prokupecz.

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