PITTSFIELD — Prosecutors have, for the first time, explicitly identified Luis Delvalle-Rodriguez as the man they believe shot Nick Carnevale at a party last August.

Delvalle-Rodriguez, 24, is among four people facing charges in the shooting near Ashley Reservoir in Washington that seriously wounded Carnevale.

The revelation came during a hearing Thursday in Berkshire Superior Court regarding a change of counsel for Delvalle-Rodriguez.

His attorney, Donald Frank, had to withdraw from the case last month because of a conflict of interest. Details of that conflict were not aired in court.

Greenfield-based attorney Isaac J. Mass will now represent Delvalle-Rodriguez in the Carnevale case. Mass also will represent him in two other open cases: one involves a charge of witness intimidation in the Carnevale shooting; the other involves unrelated charges of child rape and indecent assault and battery on a person 14 or older.

Delvalle-Rodriguez, Kevin Nieves, Daquan Douglas and Christopher Frazier face multiple charges, including armed assault with intent to murder and aggravated assault and battery with a dangerous weapon in the Carnevale case. All four are being prosecuted under a theory of joint venture.

In the months after the shooting, prosecutors had not specified whom they believed fired the shot that struck Carnevale in the head.

But, during the clarification of counsel hearing Thursday before Judge Daniel Ford, Assistant Berkshire District Attorney Joseph Yorlano confirmed that prosecutors believe Delvalle-Rodriguez is the shooter, based on a recording in which he allegedly admits to pulling the trigger.

According to information aired in court and documents obtained by The Eagle, Carnevale, 19, and two friends went to a party Aug. 21, apparently organized via a private Facebook group.

Nieves allegedly warned the woman who accompanied Carnevale to the party not to bring him, and made veiled threats.

At some point, Carnevale and others tried to leave the party in Carnevale's truck, but it became stuck in mud as a group, wielding sticks and other pieces of wood, surrounded the truck and demanded that Carnevale get out or they would start shooting.

Carnevale was forcibly removed from the truck, attacked and, at some point, multiple gunshots were fired and he was struck in the head.

Prosecutors have said his survival is miraculous.

Delvalle-Rodriguez is being held on $20,000 bail on the charges connected to the shooting.

Nieves' bail also was set at $20,000, and Douglas and Frazier had bail set at $10,000 and $5,000, respectively.

Bob Dunn can be reached at bdunn@berkshireeagle.com, at @BobDunn413 on Twitter and 413-496-6249.