Teen steals AR-15 from deputy, dances with it on Instagram, police say

17-year-old faces charges of grand theft, burglary

(Joe Raedle/Getty Images)

BOYNTON BEACH, Fla. – An Instagram video tipped off police looking for an assault rifle that had been stolen from a sheriff's deputy's unmarked car.

An arrest affidavit said a 17-year-old is accused of taking the weapon and tactical gear on Aug. 14.

Boynton Beach police arrested the teen Saturday night after he was seen on an Instagram video holding the AR-15 in the air as he danced to rap music, officials said.

Investigators said the social media video gave them grounds for a search warrant. The rifle was found under the teen's mattress, according to authorities.

The deputy told police the items, including two loaded magazines, a Taser and a ballistic helmet, were taken from his car while it was parked outside a shopping center.

The teen is charged with grand theft and burglary.