He made his debut at the age of eleven with Wolfgang Amadeus Mozart's Piano Concerto in A major in a live broadcast.
Kreiten was reported to the Gestapo by Nazi neighbor Ellen Ott-Monecke for allegedly making negative remarks about Adolf Hitler and the war effort.
But even the intervention of the equally famous conductor Wilhelm Furtwängler couldn't prevent his arrest and execution.
Because family members of an executed "traitor" couldn't be safe from regime terror, Theo and Emmy Kreiten and their daughter Rosemarie emigrated to Alsace, returning to Düsseldorf after war's end.
Prominent journalist Werner Höfer had to retire in 1987 when his articles about Kreiten received publicity.Today in Berlin, a memorial of the life and death of Kreiten exists along the "Topography of Terror" outdoor exhibit, which deals with the terror inflicted by the German SS and the Gestapo.