Arizona man planned a mass shooting targeting African Americans at an Atlanta concert to incite a race war, feds say

An Arizona man planned a mass shooting targeting African Americans and other minorities at a rap concert in Atlanta in May, looking to incite a race war ahead of the presidential election, federal authorities said.

Mark Adams Prieto was indicted by a federal grand jury Tuesday on charges of firearms trafficking, transfer of a firearm for use in a hate crime and possession of an unregistered firearm. The indictment follows a monthslong investigation by the FBI that ended with his arrest last month, the Justice Department said. A spokesperson for the agency said Prieto is in the custody of the U.S. Marshals Service for transport from New Mexico to Arizona. His attorney did not immediately respond to a request for comment.

The investigation into Prieto, 58, of Prescott, began in October, after a confidential source reported to FBI Phoenix that an individual, later identified as Prieto, had expressed a desire to incite a race war prior to the presidential election, the arrest affidavit states. The source told authorities that they had spoken to Prieto more than 15 times over three years at various gun shows. The chats grew from small talk to include political conversations, the affidavit says. Within the last year, the source told authorities that Prieto began making suspicious and alarming comments, including “advocating for a mass shooting,” and specifically targeting Blacks, Jews or Muslims, the affidavit says.

Read more: NBC News