The video, released Thursday by the Broward Sheriff's office, sheds more light on the actions of former deputy Scot Peterson, during the February 14 rampage in Parkland, Fla., that left 17 students and school staff dead, and another 17 people injured.
Authorities say the video confirms the school resource officer never went inside the building where Nikolaus Cruz was shooting at students and staff, as he was trained to do.
In a statement, the Broward Sheriff's Office said it welcomed a Florida judge's decision to release the footage but said it was prohibited from discussing any details until the investigation had concluded. Peterson, seen in a dark green uniform, quickly turns and jumps into a golf cart to investigate.
Broward County Public Defender Howard Finkelstein, whose office is representing Cruz, has said there were so many warning signs that Cruz was mentally unstable and potentially violent, and that the death penalty might be going too far. It shows him and two staff members rushing in a cart toward the three-story freshman building where the shootings happened.
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Prosecutors had previously asked the judge to deny the petition by the USA TODAY Network, the Miami Herald, CNN and others who argued that the footage should be released because of overwhelming public interest. The 27-minute video file does not show the carnage inside Building 12, and only provides a limited snapshot - mostly focused on Peterson - of the overall law-enforcement response to the mass shooting. "There are no words", said Israel, who described himself as "devastated, sick to my stomach" after watching the video. Coral Police officers entered the building when they arrived, and the deputies then joined them. He directs officers to lock the school down and block traffic.
President Donald Trump called Peterson a coward, but Peterson, through his attorney, said he wasn't sure where the gunfire was coming from and that he was "no coward". In a statement issued through his lawyer shortly after his retirement, he said he thought the shots were being fired from outside the school. Security footage from the school had somehow been rewound, and police were watching it on a 20-minute delay - leading them to believe the gunman was still in the building, when he was long gone.
The BSO last week released a detailed timeline of events based on 911 calls and dispatch communications that were made during the shooting.