Karl is a Swedish vegan straight edge and an anti-racist activist arrested in June of 2014 for animal rights actions directed against fur farming. He was sentenced to 2.5 years. Ebba Olausson and Richard Klilnsmeister were imprisoned for related charges, and were released on June 15 and June 17, 2015, respectively.

Karl has been active in, and leading many campaigns, especially against the fur industry and animal testing.

He is known for having been part of the most militant animal rights cell ever in Sweden and perhaps Europe: Animal Rights Militia. This group is the only known group that doesn`t renounce the use of violence or weapons in the fight against speciesism.

He was put in prison for 19 different crimes against the fur industry. Among others for arson, aggravated unlawful coercion and threats. He still advocates direct action today.