This is from a high school hockey game in North Dakota. The game was held at the Ralph Engelstad arena. The deceased Ralph Englestad who was former owner of the Imperial Palace Casino in Las Vegas. He came under heavy criticism for holding a birthday party for Adolph Hitler when he was owner. He had a fascination with Hitler and collected memorabilia from the Third Reich. It's no surprise that students from this high school would wear KKK hoods. A North Dakota high school principal says appropriate action is being taken after three students briefly donned Ku Klux Klan-style white robes and hoods Friday night during a state hockey semifinal game. Ralph Engelstad (January 28, 1930 Thief River Falls, Minnesota – November 26, 2002 Las Vegas, Nevada) was the multi-millionaire owner of the Imperial Palace casino-hotels in Las Vegas and in Biloxi, Mississippi and the Klondike Hotel & Casino. He was also the donor for the construction of the $104 million Ralph Engelstad Arena for his alma mater, the University of North Dakota in Grand Forks, North Dakota, and another arena bearing his name in Thief River Falls, Minnesota. A self-made man, Engelstad was one of the very few independent casino-hotel owners in Las Vegas. Engelstad was a controversial figure. He raised accusations of being sympathetic to Nazism owing to his collection of Nazi memorabilia stored in a museum within the casino-hotel, including a painting of himself in a Nazi uniform (captioned "To Adolf from Ralphie"), and a collection of antique cars alleged to have once belonged to German Nazi leaders. On April 20, 1988, he hosted a private party for the construction workers at his casino in Las Vegas. Because of this, in 1989, the Nevada Gaming Commission fined Engelstad $1.5 million "for actions that damaged the reputation and image of Nevada's gaming industry." Engelstad apologized publicly but the row was not to be his last controversial move.