Parkland shooter Nikolas Cruz's comments from his YouTube account were shown to jurors during the 23yearold's sentencing phase of his death penalty trial for the killing of 17 people at Marjory Stoneman Douglas High School in Florida. Nick Masters with the sheriff's office testified about the comments made from Cruz's YouTube page in the months leading up to the shooting, including discussing how he was going to become a "professional school shooter" and bragged that he was "going to kill a lot of people."

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