As investigators dig deeper into the law enforcement response to the deadly school shooting, in Uvalde, Texas, a host of disturbing questions remain about what officers on the scene knew as the attack was unfolding.

The suspects in the shootings at a Uvalde, Texas, elementary school and a Buffalo, New York, supermarket were both just 18 when authorities say they bought the weapons used in the attacks.

The suspects in the shootings at a Uvalde, Texas, elementary school and a Buffalo, New York, supermarket were both just 18 when authorities say they bought the weapons used in the attacks.