SIOUX FALLS - More law enforcement officers are scheduled to testified Wednesday in the Sioux Falls trial of two Hells Angels bikers.

Chad Wilson of Lynnwood, Wash., and John Midmore of Valparaiso, Ind., are charged with attempted murder for shooting and injuring five people affiliated with the Outlaws Motorcycle Club.

The shootout happened Aug. 8, 2006, at Custer State Park as the Outlaws gathered for the Sturgis motorcycle rally.

Defense lawyers argue their clients were ambushed by the Outlaws and acted in self-defense.

The trial started last week and the focus has shifted to guns and ammunition that were found at the scene and near where the men's pickup was abandoned.