Discussions on US gun laws are picking up again, but at the same time another discussion is underway.

Why did it take over 40 minutes before the police on the scene acted and got the go-ahead to go into the classroom to stop the shooter.

Desperate parents ask themselves, how many lives could have been saved?

A few days later, the police admit that it was the wrong decision to wait for further reinforcements.

- Of course it was not the right decision, it was the wrong decision.

Point.

There is no excuse for that, says Steven McCraw, head of the Texas Department of Public Safety

The motive behind 18-year-old Salvador Ramos' actions is still under investigation, but according to CBS News, the shooter was not known to the police or psychiatry.

Get a brief summary of what happened in Uvalde in the video above.