Karst Tates (March 6, 1971 in Zevenaar – May 1, 2009 in Deventer) was a Dutch man who tried to harm the Dutch Royal Family (including Willem Alexander and Beatrix). He tried to do this by making his car collide with the Royal Bus. This event happened in Apeldoorn, Netherlands on 30 April, 2009, the Dutch national holiday of Queen's Day ("Koninginnedag"). He did not succeed, but killed seven people who were watching the festivities and himself.