Police sheltering in place until the shooting stops seems to be SOP now a days.
Salvador Ramos arrived at Robb Elementary School at 11.30am on Tuesday morning after crashing his truck
A school resource officer at the scene failed to stop him from making his way inside and barricading himself
He locked himself in a fourth grade classroom where he shot dead 19 kids and two of their teachers
It took police at least hour to breach the classroom to shoot him - and it's now claimed they needed a key to get into the room
As they struggled to get him inside, desperate parents were held back from the school by cops with tasers
In new video, police are shown restraining one frantic man who asked them why they weren't in the school
'We're taking care of it!' yelled one officer who was holding parents back from the scene
One law enforcement official anonymously revealed cops took so long to get into the classroom because they needed a key
It was only when a staff member found one for them that they got inside, according to NPR
Shocking new video has emerged showing Texas cops restraining parents as they tried to rescue their kids on Tuesday after a gunman unleashed terror inside the elementary school, as questions grow over why it took so long to get to the shooter after the first 911 call.
Salvador Ramos, 18, arrived at the school in Uvalde at 11.30am, crashing his car into a ditch.
A school resource officer was at the scene but he failed to stop him from making his way inside.
Two other cops also rushed to the school at that time - Ramos had just shot his grandmother in the face at their home less than five miles away. She survived and called the police.
When they arrived, Ramos is said to have shot at them then ran into the school, where he barricaded himself in the fourth grade classroom and shot 19 kids and two teachers dead.
It took another 90 minutes from that point for police to declare the shooting over.
Now, sources say police were struggling to get into the classroom and needed a key to open the door.
Eventually, a border patrol agent was able to get inside and the shooting was declared over at 1.06pm.
But it questions remain over why it took police so long to get into the classroom where the kids were trapped with the gunman.
http://www.dailymail.co.uk/news/article-10857101/Texas-school-shooting-cops-restrained-parents-trying-save-kids.html