NTSB Probable Cause

FAILURE OF THE PILOT IN THE OVERTAKING AIRCRAFT (N97RJ) TO SEE-AND-AVOID THE AIRCRAFT THAT HAD BEEN LEADING (N911HG). FACTORS RELATED TO THE ACCIDENT WERE: THE LACK OF ABILITY FOR THE PILOT IN THE LEAD AIRCRAFT (N911HG) TO BE ABLE SEE OTHER AIRCRAFT IN THE RACE, AND SELF-INDUCED PRESSURE FOR BOTH PILOTS TO MANEUVER THEIR AIRCRAFT IN AN EFFORT TO GET A WINNING ADVANTAGE.