BOSTON — A 39-year-old Dorchester man has been arrested and charged with manslaughter in the death of a 66-year-old man who was punched outside a building on Dorchester Avenue in February, Boston police said Thursday.

Homicide detectives arrested Jason Jones on Dorchester Avenue at about 8:36 p.m. on Oct. 28 on a warrant issued earlier that day in Dorchester District Court, according to the Boston Police Department. Jones is charged with manslaughter and assault and battery on a person 60 or older or disabled.

The charges are allegations, and Jones is presumed innocent unless proven guilty in court.

The case stems from an incident on Feb. 10, police said. Officers from the department's Dorchester district were called at about 8:41 p.m. to a report of an unconscious man on the ground on Dorchester Avenue. They found Stephen Barrett of Dorchester unresponsive as Boston firefighters performed CPR, and he was taken to a hospital.

Investigators determined that Barrett had been punched by a man, causing him to fall backward and hit his head on the pavement, police said. Barrett died of his injuries on Feb. 17.

Detectives later identified Jones as the suspect and obtained a warrant for his arrest, according to police. He is expected to be arraigned in Dorchester District Court.

Police said the Homicide Unit is continuing to investigate.

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