BOSTON (AP) -- Opening statements in the trial of a Boston man accused of gunning down another man as he sat on a porch are expected in Suffolk Superior Court.

The trial of 20-year-old Lavonrence Perkins is schedule to start Monday.

Perkins is charged with first-degree murder in the May 2010 shooting death of 22-year-old Cordell McAfee.

Prosecutors say McAfee was sitting on the porch of city home when two gunmen in light-colored hooded sweat shirts approached and opened fire. McAfee was struck twice and died of his injuries. A second man on the porch was not injured.

McAfee was a prosecution witness in the trial of men accused of killing 10-year-old Trina Persad in 2002. Prosecutors say there is no evidence that McAfee's death is tied to the Persad case.