An armed man arrested Saturday during Nashville’s “No Kings” protest has a long history of fascination with Nazis and mass murderers, and he was already on the FBI's radar, NewsChannel 5 Investigates has learned.

Authorities have arrested and charged a man who allegedly brandished a handgun during the 'No Kings' protest in Nashville.

Over 1000 people gathered at the Bicentennial Mall State Park June 14 for the No Kings protest, a nationwide movement with around 2000 events across the country. Despite the spotty rain and dreary conditions, the event was lively and peaceful, with groups of musicians leading a number of chants and dance circles forming on the lawn.