Following new testimony from a former police inspector about a Russian man who was caught in an illegal police sting operation, a court Tuesday overturned his 1998 conviction for handgun possession.

The Sapporo District Court acquitted former seaman Andrei Novosyolov, 47, who served two years in prison, but did not rule on the legality of the police operation.

Novosyolov was arrested in November 1997 at the port of Otaru in western Hokkaido for possessing a handgun and was found guilty of violating the firearms control law by the district court in August 1998. He had been seeking a retrial, claiming he was the victim of an illegal operation by the Hokkaido police.