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At about 12:15 PM Monday, October 17, 2022, Phalonyous Sebastian, 21, of Somerville was placed in custody after turning himself in at District B-3 (Mattapan) in connection to an ongoing investigation into an armed robbery that occurred at about 9:30 PM on Friday, October 7, 2022, in the area of Hunt Almont Park in Mattapan.
At the time of his arrest, the suspect was wanted on an outstanding straight warrant sought out of Dorchester District Court on charges of Armed Robbery (Firearm) and Threats to Commit a Crime. This investigation remains active and ongoing at this time.