Hours of new footage released in Uvalde school shooting, showing chaos and confusion

LAW ENFORCEMENT'S LONG WAIT AS CHILDREN'S PARENTS. CHILDREN'S PARENTS DEMANDED ACTION IN ONE OF T THE DEADLIEST. ONE OF THE DEADLIEST SCHOOL SHOOTINGS IN U.S. H HISTORY. U.S. HISTORY. WE DO WANT TO WARN YOU SOME OF THE. WE DO WANT TO WARN YOU SOME OF THE E CONTENT YOU ARE. CONTENT YOU ARE ABOUT TO SEE AND HEAR I IS VERY. HEAR IS VERY DISTURBING. HERE IS MORGRGAN. DISTURBING. HERE IS MORGRGAN CHESKY. HERE IS MORGAN CHESKY. >> CAN YOU PLEASE. CHESKY. >> CAN YOU PLEASE PUT YOURUR FIREARM. PUT YOUR FIREARM DOWN? >> Reporter: NEW. VIDEO CAPTURING CRUCIAL MOMENTS INSIDE UVALDE'S. CRUCIAL MOMENTS INSIDE UVALDE'S ROBB ELEMENTARY. ROBB ELEMENTARY SCHOOL AFTER A GUNMAN OPEPEN FIRE ON. GUNMAN OPEN FIRE ON MAY 24th, 2022. THE DISTRICT. THE DISTRICT RELEASING HOURS OF NEVER BEFORE S SEEN. NEVER BEFORE SEEN FOOTAGE SHOWING A RESPONSE CAUGHT THE. FOOTAGE SHOWING A RESPONSE CAUGHT THE CONFUSION AND CHAOS.

RESPONSE CAUGHT THE CONFUSION AND CHAOS. AT 11:40 A.M. AT 11:40 A.M. JUST MINUTES AFTER THE SHOOTER ENTERED. THE SHOOTER ENTERED THE SCHOOL, YOU CAN SEE OFFICERS. SEE OFFICERS TREATING HIS GRANDMOTOTHER, THE. GRANDMOTHER, THE FIRST VICTIMIM, WHO I.D.'d HER OWN. E. I.D.'d HER OWN GRGRANDSON AS THE GUNMAN. GRANDSON AS THE GUNMAN. >> OUTSIDE ROBB. GUNMAN. >> OUTSIDE ROBB ELEMENTARY AS. >> OUTSIDE ROBOBB ELEMENTARY AS PRECIOUS TIME PASSED. ELEMENTARY AS PRECIOUS TIME PASSED. >> Reporter: PARENT. PRECIOUS TIME PASSED. >> Reporter: PARENT HEARD OFF CAMERA. >> Reporter: PARENT HEARD OFF CAMERA SHOUTING AT A FOREST. HEARD OFF CAMERA SHOUTING AT A FOREST -- AUTHORITIES TO DO. SHOUTING AT A FOREST -- AUTHORITIES TO DO SOMETHING. -- AUTHORITIES TO DO SOMETHING. BY 12:00 P.M., WITH. SOMETHING. BY 12:00 P.M., WITH DOZEZENS OF ARMED. OFFICERS LINING HALLWAYS, THE SCHOOL'S POLICE. HALLWAYS, THE SCHOOL'S POLICE CHIEF,F, PETER.

SCHOOL'S POLICE CHIEF, PETER ARREDONDO, BEGAN. ARREDONDO, BEGAN PLEADING WITH THE GUNMAN, BABARRICADED. GUNMAN, BARRICADED INSIDE A CLASSROROOM. >> PLEASE TALK TO. INSIDE A CLASSROOM. >> PLEASE TATALK TO ME. >> PLEASE TALK TO ME. PLEASESE TALK TO ME, PLEASE TALK TO ME, SIR. >> Repeporter: NO. SIR. >> Reporter: NO RESPONSE IS EVER. >> Reporter: NO RESPONSE IS EVER HEARD. RESPONSE IS EVER HEARARD. NEARBY, OTHER. HEARD. NEARBY, OTOTHER OFFICERS TRIED TO. NEARBY, OTHER OFFICERS TRIED TO CLEAR CLASSROOMS OF. OFFICERS TRIED TO CLCLEAR CLASSROOMS OF TERRIFIED STUDENTS. CLCLEAR CLASSROOMS OF TERRIFIED STUDENTS AND TEACHERS. TERRIFIED STUDENTS AND TEACHERS. AT 12:08 P.M., THE. AND TEACHERS. AT 12:08 P.M., THE GUNMAN'S OWN AUNT. AT 12:08 P.M., THE GUNMAN'S O OWN AUNT HEARD BEGGING. GUNMAN'S OWN AUNT HEARD BEGGING AUTHORITIES TO SHOOT. AUTHORITIES TO SHOOT HIM. >> KILL HIHIM.

HIM. >> KILL HIM. KILL HIM. >> KILL HIM. KILL HIM. HE IS DOING IT. KILL HIM. HE IS DOING G IT BECAUSE --. HE IS DOING IT BECAUSE -- >> Reporter: NEARLY. BECAUSE -- >> Repororter: NEARLY AN HOUR AFTER THE. FIRST GUNSHOT, AUTHORITIES SHOUT QUESTIONS BACK AND. AUTHORITIES SHOUT T QUESTIONS BACK AND FORTH, LOOKING FOR. QUESTIONS BACK AND FORTH, LOOKING FOR KEYS. FORTH, LOOKING FOR KEYS. >> WHO HAS THE. KEYS. >> WHO HAS THE MASTER KEYEY DOWN. MASTER KEY DOWN THERE? ANYBYBODY? ANYBODY? >> Reporter: THEY WOULD LATER FIND THE. >> Reporter: THEY WOULD LATER FIND THE DOOR UNLOCKED. DOOR UNLOCKED. PAINFUL MINUTES FOLLOW UNTIL 12:50. PAINFUL MINUTES FOLLOW UNTIL 12:50 P.M. P.M. WHEN A TEAM OF OFFICERS REACHED THE. WHEN A TEAM OF OFFICERS REACHED THE CLASSRSROOM.

WITH THE GUNMAN. WITH THE GUNMAN DATA, AUTHORITIES. ED. DATA, AUTHORORITIES FRANTICALLY CALLED FOR MEDICAL BACKUP . FRANTICALLY CALLED FOR MEDICAL BACKUP . THE FRIGHTENING. FOR MEDICAL BACKUP . THE FRIGHTENING SCENE E UNFOLDING INTO. THE FRIGHTENING SCENE UNFOLDING INTO ONE OF THE DEADLIEST. SCENE UNFOLDING INTO ONE OF THE DEADLIEST SCHOOL SHOOTINGS IN. ONE OF THE DEADLIEST SCHOOL SHOOTINGS IN U.S. HISTORY. SCHOOL SHOOTINGS IN U.S. HISTORY. NBC NEWS HAS REACHED. U.S. HISTORY. NBC NEWS HAS REACHEDED OUT TO THE FAMILIES. NBC NEWSWS HAS REACHED OUT TO THE FAMILIES OF THOSE VICTIMS BUT.