A Dorchester teenager was sentenced to five to six years in state prison today for a botched armed holdup on Monsignor Lydon Way in 2011 - three weeks after Ciaran Conneely, an Irish immigrant, was shot to death near his Nahant Avenue home.

In March, a Suffolk Superior Court jury convicted John Graham, now 19, of the double shootings, but acquitted him for Conneely's murder.

The Suffolk County District Attorney's office had asked Judge Linda Giles for a sentence of six to ten years, but she said Graham's basically clean record before the shootings and his homeless life in a "toxic environment" without adult supervision merited a reduced sentence. He will serve three years on probation after his release.

According to the DA's office:

"Evidence and testimony presented during the trial proved that Graham, armed with a firearm, approached the then 18- and 20-year-old victims on Monsignor Lydon Way and demanded cash. When the men refused to comply and even mocked him, Graham shot them and fled without taking their money. One victim was struck from behind by four bullets; the second victim was shot once in the arm."