Marius Mason is an American anarchist who in 2009 was sentenced to 22 years in prison after admitting 13 counts of arson and property damage amounting to US$4 million. Mason, a member of the Earth Liberation Front, was prosecuted for a 1999 attack on a building at Michigan State University, East Lansing, Michigan, that caused more than US$1 million in damage, undertaken as a protest against research into genetically modified crops. A further US$3 million in damage included attacks on homes under construction, and on boats owned by a mink farmer.