The spring sitting of Dukes County superior court wrapped up this week, with a jury convicting a Jamaica Plain man of drug trafficking. Several trials scheduled for the October superior court session.

Two Island men were arrested this week in connection with a nearly 10-month investigation into a large-scale drug trafficking operation by the federal Drug Enforcement Agency (DEA) and the Martha’s Vineyard Drug Task Force. The arrests led to search warrants being issued in three different states.

Sean Herrmann, 31, was arrested by a federal drug enforcement task force at his residence in East Greenbush, N.Y. last Wednesday on federal charges of drug possession and distribution, DEA special agent Erin McKenzie-Mulvey said.