The persecution of Sinti and Roma did not come out of nowhere. In the mid-1930s, a research institute in Nazi Germany, led by doctor and psychiatrist Robert Ritter, is concerned with the ‘gypsy question’. According to it memory center Ritter specializes in Criminal biology. “This branch of science assumes that the tendency to criminal behavior is a hereditary trait. Ritter harbors great prejudices about Sinti and Roma. They are said to be guided by their urges, to be incapable of thinking and to have a lack of work ethic. “