Broward County Judge Elizabeth Scherer entered the plea on Cruz's behalf after his lawyers indicated he would stand mute, declining to plead either innocent or guilty on the 34-count indictment related to the February 14 school shooting at Marjory Stoneman Douglas High School. Seventeen people were killed. The police force said the footage justifies action against Deputy Scot Peterson.
Peterson was suspended and then resigned his post.
The shooting rampage has also prompted several investigations into how officials handled warnings about Cruz beforehand and how they reacted to the shooting itself. Those calls were the second batch of recordings made public from the shooting.
Cruz said nothing during a brief hearing. Coral Springs officers, the first to arrive on the scene, pushed into the building anyway.
The fallout from the massacre at Marjory Stoneman Douglas High School continued to reverberate across the country, with students at thousands of schools walking out of class Wednesday morning to mark one month since the shooting.
Cruz, 19, has been charged with 17 counts of premeditated murder in the first-degree and 17 counts of attempted murder in the first-degree. He said it confirms that Peterson should have entered the building: that is an almost-universal response in police training after the 1999 Columbine High and 2012 Sandy Hook school shootings.More news: NFL Star Reportedly Facing 4-Game Suspension For PEDs
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After police reviewed the surveillance video, Peterson was placed on unpaid leave.
"Someone might want to check Scott Peterson's allegiances", someone else said. But what was relayed on the radio was that the gunman might have been spotted outside in a parking lot.
The video starts about a minute after the suspect, Nikolas Cruz, began firing his semi-automatic rifle, according to the timeline released by the Sheriff's office. Officers described coming across bodies, bleeding students and bullet-pocked windows.
They also were operating on delayed information. It shows him and a staff member rushing toward the building in a cart.
The teen was arrested shortly after committing the Valentine's Day killings and fleeing the high school campus among terrified students.
Students, teachers, parents and others associated with schools are participating to push for legislation that aims to protect public places from gun violence.