What happened
The aircraft was observed flying around the airstrip at dusk. As it passed over the approximate center of the field, it was seen to nose over into a steep angle, continuing until impact.
The investigation
Investigation revealed no evidence of any malfunction of the aircraft or the engine. Further investigation into the pilot's background uncovered that he was going through divorce proceedings, which included a custody problem with two children. In addition, a note was found in the pocket of the pilot indicating the termination of a relationship immediately preceding the fatal flight.
Findings
The pilot had obtained prior permission to fly 1 of the 2 J3 Cub aircraft based at the field; however, the aircraft involved in the accident was not the one authorized. N70645 was owned by a pilot who admitted to being 'real good friends' with the victims wife.