Boston Police report arresting a man they say had a loaded gun ready to fire in his backpack on an MBTA bus rumbling up Blue Hill Avenue from Mattapan Square yesterday afternoon.
Police say Dawan Johnson, 45, of Dorchester, "racked a round into the chamber" in an attempt to come out on top in an argument in Mattapan Square, then, having allegedly made his point, boarded a bus bound for Nubian Square, shortly after 5 p.m.
Officers, alerted to his gun-enabled presence on the bus, stopped the bus:
The officers removed the suspect from the bus and recovered a loaded 9mm pistol from the suspects backpack. The firearm was later discovered to contain 3 live rounds of ammunition in the magazine and 1 live round in the chamber.
He was charged with illegal possession of a firearm, illegal possession of ammunition, illegal possession of a loaded firearm and assault with a dangerous weapon - firearm - police say.