Authorities released new surveillance video today that shows some Marjory Stoneman Douglas High School students just as a gunman was opening fire at the Parkland, Florida, campus. He was arrested an hour later about a mile from the school.
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The former deputy has denied any wrongdoing during the incident, claiming that he only followed BSO training, establishing a "tactical position" because he believed the gunfire was coming from the outside of the building.
His attorney, Joseph DiRuzzo, could not be reached for comment Thursday.
He said: "Let there be no mistake, Mr Peterson wishes that he could have prevented the untimely passing of the 17 victims on that day, and his heart goes out to the families of the victims in their time of need".
John Bostain, an independent police trainer, reviewed the video at the request of The Associated Press. In one of the calls, Peterson tells the dispatcher that shooter Nikolas Cruz was in the parking lot outside the school - in truth, Cruz was still in the building.
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Ludwick and the woman knew each other, said a police spokesman in North Port, a small city south of the Tampa Bay area. John Christopher Ludwick tried to kidnap a woman Wednesday as she exited her driveway in North Port.
Cruz's state-assigned public defender Melissa McNeil added that Cruz would plead guilty if prosecutors waived the death penalty as a potential punishment.
Broward County Judge Elizabeth Scherer entered a "not guilty" plea on Cruz's behalf, after his lawyers indicated he would stand mute, or refuse to plead either innocent or guilty.
Last week, a county judge ordered the clips to be released in the name of "strong public interest" after the Miami Herald, the South Florida Sun-Sentinel and other media brought a case against the sheriff, who had custody of footage.
Police and school officials had resisted the release, saying it was evidence in an active investigation.
The surveillance footage initially shows a uniformed officer and another man outside an arcaded part of the school. "His actions were enough to warrant an internal affairs investigation, as requested by Sheriff Scott Israel on February 21", the sheriff's office said in a statement accompanying the CCTV footage.