A 17-year-old boy in Boynton Beach was arrested Saturday after he bragged on Instagram about having an AR-15 semiautomatic rifle, authorities said.
The video drew the attention of police because a similar weapon was stolen from an unmarked police car parked at a Boynton Beach shopping center last week.
A spokesperson for the Boynton Beach Police Department identified the teen thief as Moses Clay Jr.
Clay is facing charges of burglary and grand theft.
After being tipped off to the Instagram video, a Boynton Beach police officer and his K-9 partner searched Clay's mother's home and found the rifle underneath a mattress, police said.