The Suffolk County Grand Jury late today returned a nine-count indictment charging a Dorchester youth with the October homicide of 36-year-old Ciaran Conneely on Nahant Avenue, District Attorney Daniel F. Conley said.

The indictments charge JOHN GRAHAM, 17, with first-degree murder, armed assault with intent to rob, and unlawful possession of a firearm in connection with Conneely’s Oct. 10 shooting death.

The indictments additionally charge Graham with two counts of armed assault with intent to rob and single counts of armed assault with intent to murder, aggravated assault and battery with a dangerous weapon, assault and battery with a dangerous weapon, and unlawful possession of a firearm for an Oct. 30 incident in which Graham allegedly shot two adult men during the course of an attempted robbery on Monsignor Lydon Way.

Boston Police arrested Graham on Nov. 6 for the later incident; he is currently held on $100,000 cash bail on that case. In light of evidence developed during the non-fatal shooting investigation, Boston Police homicide detectives continued to gather information – including information presented to the grand jury in the days and weeks that followed – leading to today’s indictments.

Graham has not been formally arrested for Conneely’s slaying, but a warrant has been entered and he will remain in custody until he is arraigned in Suffolk Superior Court. An arraignment date has not yet been scheduled. No further information will be released this evening.