Arrest in mass shooting plot

Authorities intercepted Gillum at a hotel in Destin while he was reportedly en route to the music festival.

The 44-year-old, once honored as 'Officer of the Month,' is charged with making terroristic threats and possessing illegal weaponry.

Separately, two teenagers were arrested in North Carolina and Texas for a foiled plot to attack a Houston synagogue.

These incidents have prompted increased security measures at major public events across the Southeast as federal investigators probe potential links to extremist networks.