A Lawrenceville man was killed Friday night on Old Hog Mountain Road in South Hall County after speeding through a Georgia State Patrol checkpoint and crashing his motorcycle, state patrol officials said. Joshua Clark, 29, was driving a 2006 Suzuki motorcycle when he came to the checkpoint at Old Hog Mountain and Wade Orr Road, according to the state patrol. Sgt. G.R. Harper said Clark briefly slowed down but then accelerated past the checkpoint, and at about 9:50 p.m. he crossed the center line and struck a 2005 Mazda hatchback.