At about 1240 Central time, the Experimental airplane collided with the ground during approach to the General Dewitt Spain Airport. Visual conditions prevailed; the Private pilot received fatal injuries, and the airplane was substantially damaged. The seller of the airplane later reported the pilot purchased the one-seat airplane that day and wanted to fly it home. A witness standing at the airports midfield stated the airplane appeared to be about 200 feet above the ground on the downwind. The witness stated the airplane turned base and was very slow with the nose high. He stated that when the airplane turned final, it spun about half a turn to the left and dove straight into the ground.