It's the story of Ernst Lossa born in 1929 in Augsburg. Lossa was a member of the Yenish, who are a group of Germans who have their own dialect of that language and who travel from place to place. (Perhaps the most comparable English-speaking group are the Irish Travelers.) Lossa was a bad kid, whose father ended up in Dachau at least twice (although he was released). After committing many petty crimes, he ended up at a sanitorium called Kaufbeuren, which is still in operation today.
In 1939 the Nazis, under a decree called Aktion T4, announced that anyone who they thought was incurably ill or "mentally defective" would be sent to a concentration camp called Hadamar.
According to the guidelines for educators on teaching the Holocaust, printed April 20,1999 by the USHMM, Washington, DC, it was up to one half million Gypsies [Romani & Sinti] and at least 250,000 mentally & physically disabled were [Nazi perpetrated] genocide victims.