From Wikipedia

The Man Who Ate His Lover

Armin Meiwes 
born December 1, 1961
is a German man who achieved international notoriety for killing and eating a voluntary victim whom he had found via the Internet. After Meiwes and the victim jointly attempted to eat the victim's severed penis, Meiwes killed his victim and proceeded to eat a large amount of his flesh. Because of his deeds, Meiwes is also known as the Rotenburg Cannibal or Der Metzgermeister (The Master Butcher).

Since entering prison, Meiwes has become a vegetarian and has joined a prisoners' group favoring Green Party politics.