A 21-year-old Canton man was sentenced to a life term in prison on Wednesday for his role in the murder of a 15-year-old Dorchester boy who was shot to death in a brazen attack on Ellington Street in July 2022.

Zontre Mack was convicted last month by a jury that found that he fired the gun that killed Curtis Ashord, Jr. Mack, who was 18 at the time of the murder, will be eligible for parole in 30 years.

Judge Mary Ames issued the sentence.

An accomplice in the shooting— Dominick Gavin, 27, of Boston pleaded guilty to one count of accessory after the fact on August 20.

Ames sentenced Gavin to three to four years in state prison.

In a victim impact statement, Curtis Ashford’s aunt said that her brother and Ashford’s father, Curtis Ashford Sr., “was also taken from us 16 years ago from someone just like you. Someone who didn’t know him, someone who had no regard for the lives of others and what their actions would do to the families of the ones they hurt.”

District Attorney Kevin Hayden called the Ellington Street murder “a tragedy upon a tragedy.”

“Curtis Ashford’s family will mourn his loss forever and Zontre Mack will spend a large portion of his adult life away from his family, all because of a quick and deadly decision to pull the trigger on an illegal gun. There is nothing but tragedy and sadness in such a scenario,” Hayden said.