DOVER, N.H. — Jurors convicted a man of first-degree murder Monday in the killing of a teenager during a robbery in Madbury last year.

Prosecutors say 19-year-old Tristan Wolusky of Rochester and two others drove to 18-year-old Aaron Wilkinson’s home with plans to steal money and drugs.

Wilkinson was stabbed to death on June 21, 2014. His body was left on the side of a road in Lebanon, Maine.

Wolusky, who pleaded not guilty, faces life in prison without parole. The others, 19-year-old Zachary Pinette of Springvale, Maine, and 22-year-old Michael Tatum of Barrington, New Hampshire, face 30 years to life in prison. They pleaded guilty to second-degree murder in exchange for testifying against Wolusky as part of a plea agreement.

Tatum said he saw Wolusky stab Wilkinson multiple times; Pinette said he saw Wolusky with a knife, but could not accurately recall if he actually stabbed Wilkinson.

The trial lasted several weeks. Jurors got the case Thursday.

Wolusky testified that he didn’t stab Wilkinson. He said he Pinette and Tatum planned to steal drugs and money from him.

He said he did help dispose of Wilkinson’s body.

Court documents say knives and a machete were used to stab Wilkinson. The records also mention a plan to kill him.