The Facebook post included several photos of a smiling Baltimore County police officer, some of him in a suit, another sporting outdoor gear. None showed him in uniform or flashing a badge.
The officer works undercover, and the Facebook poster warned that he investigates gun-related cases. The Facebook user's friend had been arrested in June by the officer in an illegal arms sting. The officer is "known to pose as a gun dealer in order to entrap and arrest people," the post read.