Ciaran Conneely: Shot dead on Oct. 10, apparent victim of a street robbery turned deadly.A Dorchester teenager was indicted this week for allegedly killing Ciaran Conneely, a 36 year-old man who was shot to death outside his Nahant Avenue apartment building on Oct. 10. John Graham, 17, will be charged with first degree murder in Conneely’s murder, which rocked the Adams Corner neighborhood last fall.

The indictment also charged Graham with two counts of armed assault with intent to rob in an Oct. 30 incident on Monsignor Lydon Way in which Graham is alleged to have shot two men during an attempted robbery.

Suffolk County District Attorney Dan Conley’s office said that Graham was arrested on Nov. 6 for the Lydon Way incident and is now being held on $100,000 cash bail in that case. 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,” Conley’s office said in a statement.

Conneely, known by the nickname “Kiwi” to his friends and neighbors, had lived in Dorchester for the last decade and worked in construction. A neighbor found him suffering from a single gunshot wound to the chest and lying along the curb outside 20 Nahant Ave., just steps from his apartment at about 1 a.m. on Oct, 10. He was taken to a local hospital with life-threatening injuries and died later in the morning, according to the Police Department.

The Nahant Avenue murder took place in close proximity to the scene of an armed robbery on Ashmont Street in the hours before Conneely’s body was found. Earlier this week, Boston Police said they do “not believe that the Nahant Ave incident has any connection to an earlier incident.”

Elaine Driscoll, a spokesperson for the Boston Police, said “the Nahant Ave investigation remains active and at this point we cannot comment beyond the indictment.”

State Rep. Martin Walsh, whose parents emigrated from Ireland’s County Galway in the 1960s, said he hopes the indictment “will bring some comfort to the Conneely family. I’m very grateful to the Boston Police for their persistence in this case. It’s just senseless,” Walsh said of the crime. “It’s a sad situation when you have a 17 year old, who should be in high school looking forward to his life. Now his life is over, too.”