http://www.racinboys.com/forum/index.php?t=msg&th=20341&start=0&
updated info
http://www.abc17news.com/news.php?id=7287
More info:
http://ksisradio.com/major-crashes-occur-at-the-2012-missouri-state-fair-races-spectators-injured/
http://www.komu.com/news/breaking-accident-at-sedalia-speedway/
http://www.kmzu.com/crash-reported-at-state-fair/
http://www.connectmidmissouri.com/news/story.aspx?id=790369#.UDI3wKMgwaQ