Concerned that Diels was not ruthless enough to use the Gestapo effectively to counteract the power of the SA, Göring handed over its control to Himmler on 20 April 1934.[55] Also on that date, in a departure from long-standing German practice that law enforcement was a state and local matter, Hitler appointed Himmler chief of all German police outside Prussia. Himmler named his deputy and protégé Reinhard Heydrich chief of the Gestapo on 22 April 1934.