WFXT reports a police source told it the three were responsible for the posters.
Police say officers patrolling Maverick Square last night because of the posters:
Observed a group of males wearing face masks [on Winthrop Street]. Officers approached the group, one of which had been carrying a can of spray paint, in an attempt to speak with them. While speaking with one of the members of the group, who was extremely uncooperative, the male removed his wallet from his pocket. However, when officers reached to obtain what they thought would be the male’s identification card, they were met by the male slapping the officer’s hand away. Officers placed the male under arrest. Officers subsequently arrested two additional members of the group.
Matthew Wolf, 26, of Lowell, was charged with assault and battery on a police officer, police say. Tylar Larson, 18, of Rochester, NY, and Christopher Hood, 20, of Malden, were both charged with possession of a dangerous weapon. Police did not specify the type of weapon. They were not charged in connection with the posters.