At about 1610 Central time, the airplane impacted the ground. The flight instructor pilot and three passengers were fatally injured; the airplane was substantially damaged. Visual conditions prevailed.
Radar data showed the airplane level at 7000 feet msl on a southeasterly heading. At 1610:49, the airplane entered a right turn and began descending. The airplane disappeared from radar shortly thereafter. There were no reported ATC communications with the airplane. Ground scars and witness marks to trees surrounding the accident site were consistent with the airplane being in a steep nose-low attitude at the time of impact.