BOSTON — Officers assigned to District B-3 arrested Ricardo Cadet, 19, of Boston, for unlawful possession of a firearm during a summer festival Sunday evening.
At about 7:57 p.m., officers were monitoring the crowd at 1 Playstead Park when they observed multiple groups on the outskirts of the event.
Officers walked through the crowds and noticed three individuals they had prior interactions with, each carrying a backpack…