Marie Mason is a 52-year-old mother of two children, a long-time activist in environmental and labour movements, an artist, gardener, musician, writer, poet, an Earth First! organiser, a volunteer for a free healthcare collective, a worker for numerous charities and a political prisoner in the United States.
In 1999 and 2000, several acts of property damage and arson claimed by the Earth Liberation Front were carried out by Mason and her then-husband, Frank Ambrose. No one was injured in any of these protest actions.