Pilot-owner of this aircraft Jack Roush had had at least 2 previous accidents including one in a P-51 Mustang which he sunk in a lake in Georgia (or someplace in the south) fortunately there was a retired Marine on shore who rushed to the scene and plucked him out to safety. Roush should not have been flying very high performance planes.
The real cause of the events that led up to the unfortunate crash, was Pilot Roush's failure to monitor departure frequency, especially during a time of potential for heavy traffic at Air Venture. Even flying into an airport of any size or degree of traffic flow, we were always taught not only to keep our head on a swivel but to monitor all pertinent tower transmissions. This accident was 100% avoidable.