Surveillance footage from inside Robb Elementary School is stated to show that police made no attempt to open the door, and there is reason to believe it may even have been unlocked, a law enforcement source explained to the San Antonio Express-News.
The surveillance footage from inside Robb Elementary School throughout the May 24 massacre has not been publicly released, yet has been seen by the Express-News.
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Robb Elementary had an automatic door locking system in place, which locked doors once they'd closed.
Though at least one was broken on the day of gunman Salvador Ramos's massacre, enabling him to gain entry to the school.
And it's now believed the door of the classroom he targeted may likewise have been broken, meaning cops could have entered it freely.
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Ramos wouldn't have been able to lock the door of the room from the inside either, it is argued.
Cops spoke of battling to find a master key for the door on the day of the attack, thinking the room to have been locked.
It has now emerged they were trying out keys in the doors of other nearby classrooms, instead of the one where the killings were taking place, in an attempt to find a master they could then use to open the murder room.
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Embattled Uvalde School District Police Chief Pete Arredondo, who led the response on-scene, has previously declared that the classroom door was locked, and he spent much of the standoff personally searching for a master key to the school.
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Although, the progression of events suggests that the automatic door locks on the classroom may have failed, because the gunman Salvador Rolando Ramos was able to gain entry without a key.
Doors at the school are designed to lock automatically when they close, and can just be locked or unlocked from the outside with a key, according to the police source.
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It means that Ramos would not have been able to lock the door from the inside, and if it was unlocked when he entered, may have remained so.
Police on the scene may have wrongly believed that the classroom door was locked as they stood in the hallway for over an hour. Nonetheless, they did have access to pry bars that could have opened the door without a key, the source announced.
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The shooter entered Robb Elementary at 11.33am on May 24, entering through an exterior door that had been pulled shut by a teacher yet that failed to lock automatically as it was supposed to -- another hint that something was wrong with the school's door locks.