Police arrested a 16-year-old from Mattapan on Wednesday evening (March 5) after a brazen shooting incident on Erie and Ellington Streets that upended the neighborhood from Columbia Road to Codman Square for two hours.

ShotSpotter activations went off around 6:34 p.m. and police found 28 shell casings in the street upon arrival. Police say no one was hit by gunfire, but one person was reportedly injured diving for cover behind a car.

On the scene, police say they found a teen-age victim who was surrounded by several other youths outside 70 Ellington St. They told police three suspects approached the victim on scooters and started asking questions. They fired numerous shots at him before fleeing.

A description of the suspects was broadcast, and a crime scene was established, blocking off the road around Glenway Street. Officers canvassing the area say they encountered two scooters driving at a high rate of speed on Harvard Street about a half-mile from the scene near Greenwood Street and a railroad bridge.

A passenger fell off one of the scooters during the chase and fled on foot on Harvard Street, and onto Norwell Street where he tried to escape by getting onto the commuter rail tracks. He was eventually taken into custody behind a home on Norwell Street with the help of a K-9 officer and a heavy BPD response.

The scooter-driver, police say, drove away from the scene and made good his escape. Police had noted an item discarded near Greenwood Street at the beginning of the chase and circled back to that scene where they located a tan-colored Canik semi-automatic firearm with an empty magazine.

The other suspects were not located, despite a very active search for more than an hour with a helicopter and multiple police units in Codman Square, Talbot Avenue, Norfolk Street, and up Washington Street.

The 16-year-old Mattapan juvenile arrested on Norwell Street was placed under arrest for Trespassing, Carrying a Firearm Without a License, Unlawful Possession of Ammunition, Possession of a Large Capacity Firearm, Carrying a Loaded Firearm Without a License, Assault & Battery with a Dangerous Weapon (Firearm), and Discharging a Firearm Within 500 Feet of a Dwelling.