Harrowing never-before seen footage shows distraught Uvalde students with blood-soaked hair and clothes fleeing Robb Elementary on school bus – as one girl tearfully tells trooper how she tried not to cry while calling 911 to report mass shooting

Harrowing new images of a little girl covered in blood during the Uvalde school shooting have emerged, along with video of children escaping through classroom windows.

Salvador Ramos, a Robb Elementary School graduate, opened fire on young students with an AR-15 on May 24 last year, killing 19 children and two teachers.

Police were heavily criticized for their response after it emerged that officers had waited on the premises for more than an hour and fourteen minutes before forcing their way into the classroom to engage Ramos.

Khloie Torres, who was 10 at the time, resorted to smearing her classmates' blood on herself to survive the deadly rampage, and new footage shows her looking shocked on a bus next to another bloodied pupil.

Published by Propublica With her parents' permission, the bodycam clip shows the child telling Department of Public Safety Special Trooper Crimson Elizondo that she had recently desperately called 911.

“I was on the phone with the police officer,” Khloie shouts, as Elizondo tells her, “You were so brave.”

Khloie responds, “I was trying not to cry,” amid the sounds of loud ringing and a child sobbing in the background.

In the disturbing images, the child sees blood splattered on her clothes and in her hair. She previously said she was considering what her last words would be as the horror unfolded.

Khloie had been taking a class with hero-killed teacher Irma Garcia when the shooting happened, as recess had just ended, and since it was the end of the school year, she put on a movie when things took a terrible turn.

“She told us we were going to be shut down soon,” she previously told Fox News. “So, my friend, he got up and turned off the TV because that's what we had to do.

“And right as she went outside to find the key and lock the door from the outside, we heard gunshots.”

Khloie said Garcia tried to close the door at that point, but crazed gunman Ramos forced his way inside.

She said the Garcia began watching the children while her friend and classmate Armory used a friend's phone to try to call 911.

“When she did that, he started saying, 'You're going to die!' Khloie said.

Garcia began begging and pleading with Ramos as she tried to defend her children, but to no avail.

“He shot my friend and my teachers,” the child recalled. “And then he said 'good night,' and started shooting everyone.”

Khloie said Ramos walked around the classroom shooting everyone he could see before reaching her.

“He shot the girl next to me and she said, 'I've been shot!' And I didn't want to say anything because I didn't want him to come up to me and shoot me. So I stayed quiet. He came back and shot her again because she wouldn't be quiet.”

Then, she says, the gunman walked to the classroom connected to hers and continued shooting.

When the gunfire stopped and she heard Ramos enter the hallway, she ran into the classroom to see if anyone had survived. “It's hard because there were bodies everywhere,” she said.

Khloie said she tried to contact police several times, but was always told officers were already at the school.

Ruben Torres, Khloie's father, said he was misinformed when the tragedy occurred.

'I heard it from a colleague of mine who told me it was a high-speed chase. And that's common here, so I didn't think about it,” he said. “If I had known there was an active shooter on her campus, I would have left work immediately.”

For now, Torres is focusing on making sure his daughter recovers from the terrible things she has endured.

'It's going to be a long road. This will never go away for her,” he said.

Another video shows police officers running to a window before helping children escape.

Students can be seen frantically jumping out of windows with the help of officers before running through a field.

Ramos began the deadly rampage after shooting and seriously wounding his grandmother in their home earlier that day.

He broke into Robb Elementary in Uvalde, south Texas, and remained in an adjacent classroom for more than an hour before members of the United States Border Patrol Tactical Unit fatally shot him.

Ramos managed to evade several local and state police officers who stood in the school hallways for more than an hour.

Police officers also waited on the premises for more than an hour and fourteen minutes before breaking into the classroom to attack Ramos. The force was criticized for its leaders' failure to take control or set up a command post.

Some officers struggled with faulty radios, according to ProPublica, but they understood the shooter may have been alone in a room without victims and failed to act quickly.

They also cordoned off the area, leading to violent clashes between officers and parents trying to enter the school to rescue children.

Surgeons at the Uvalde hospital have also suggested that the delay in responding to the shooting may have cost some children their lives.

It remains unclear exactly how many children were in the classroom when the gunman opened fire, how many were killed immediately and how many were still alive but injured when police arrived.

Uvalde Memorial Hospital received two children who were deceased upon arrival at the hospital.

Since the Columbine shooting in 1999, officers across the country have been advised not to wait for backup and enter the school to look for the shooter.

Instructions from the Texas Police Chiefs Association state: “The first two to five responding officers should form one team and enter the building.”

Why that advice was ignored in Uvalde is one of many aspects of the slow response now under investigation.

Another reason is why police initially falsely claimed the shooter exchanged gunfire with a school employee before even reaching the classroom.