The two-engine Piper Cheyenne crashed about 1 mile from the Lafayette Regional Airport.
An Army soldier from Michigan had to buy a one-way plane ticket for $2,500 after his flight was unexpectedly canceled.
Joel Michael Bane, an Iraq and Afghanistan war veteran, pleaded guilty to one count of interference with a flight crew.
A special dedication ceremony was held Sunday to commemorate the new 93-foot-tall Tower of Voices.
The plane crashed either while the man was doing stunts or because of a lack of flying skills, according to officials.
The planes represent perhaps the final benefits Iran will see under the nuclear deal rejected by President Trump.