Joe Romack has been coming to the race since 1934.
The Department of Natural Resources (DNR) is investigating the accident.
The boat did not flip over and no one was thrown from the boat.
The tricycle winner was congratulated by Mr. and Miss. Circle City IN Pride after the race.
The only other time Dixon started on the pole at Indy, in 2008, he won the race.
Provost Thomas Burish told those graduating Sunday the deaths are reminders of the fragility and preciousness of life.
Police were aware that gang members were gathering at the restaurant and officers were present when shots began.
Conservation officers are investigating, but foul play is not suspected.