A Suffolk Superior Court jury today found Calvin Carnes guilty of four counts of first-degree murder for shooting four aspiring musicians in a Dorchester basement on Dec. 13, 2005. Prosecutors say Carnes, now 21, shot Jason Bachiller, 20, Jihad Chankhour, 22, Edwin Duncan, 21, and Christopher Vieira, 19, a total of 15 times in Duncan's recording-studio basement on Bournside Street.

A pal of Carnes, Robert Turner, pleaded guilty in April to being an accessory after the fact to murder; he admitted watching Carnes kill the men.

According to the DA's office:

Evidence introduced at trial proved that Carnes accompanied Vieira to Duncan's Bourneside Street home, where the victims and others would socialize. Bachiller, Duncan, and Vieira would record music as the blossoming hip-hop group Graveside; Chankhour, a close friend, would often visit and occasionally assist in technical matters related to musical equipment in the band’s makeshift studio.

Carnes is believed to have taken a Glock 9mm semiautomatic handgun from Vieira, who had recently acquired it and was given to showing it off. After shooting Vieira, he shot and wounded each of the others, executing each with additional shots as they lay wounded.

Carnes and Turner also took an AK-47 and a 12-gauge shotgun belonging to the now dead men, then fled in one of their cars.

Closing statement by the assistant DA.