Boston Police arrested a 16-year-old on Friday for allegedly killing another teen in Mattapan over a year ago.

The male suspect who was not identified by police because he is a juvenile, was charged with murder, using a firearm while committing a felony, attempted assault and battery with a firearm, and carrying a firearm without a license.

Police arrested the teen around 12:26 p.m. in Jamaica Plain with a warrant from Suffolk Superior Court. He is expected to be arraigned there this week.

The arrest comes over a year after police responded to a report of a person shot around Gladeside Avenue and Donwood Terrace in Mattapan at 12:23 p.m. on July 5, 2024. Police arrived to find two victims, later identified as Stoughton High School students, with gunshot wounds. Christian Cousins, a 17-y

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