At about 3:11 AM on Sunday October 7, 2018, officers assigned to District B-3 (Mattapan) made an onsite firearm arrest following a foot pursuit in the area of 38 Greenwood Street in Dorchester. Officers were attempting to stop a motor vehicle for a traffic infraction when the front seat passenger, later identified as Steven Woumnm, 30, of Dorchester, suddenly exited the vehicle as it was coming to a stop and began to run while clutching at the waistband area of his pants. Officers pursued the suspect on foot into a nearby yard where he was placed in custody after failing to scale a fence. Officers were able to safely recover a 9mm FEG PA-63 handgun which the suspect had discarded as he fled. The suspect will appear in Dorchester District Court on charges of Unlawful Possession of a Firearm (2nd and Subsequent) and Trespassing.