Mark Adams Prieto, a 58-year-old resident of Prescott, Arizona, was arrested last month on federal charges related to an alleged plot to carry out a mass shooting at a Puerto Rican rapper Bad Bunny concert in Atlanta, Georgia. Prieto, who reportedly aimed to incite a race war, was indicted by a federal grand jury on charges of firearms trafficking, transferring firearms to commit hate crimes, and possession of unregistered weapons