In practice, since the SS answered only to Hitler, the de facto merger of the SS and the police made the police independent of Frick's control.[52][62] In September 1939, the security and police agencies, including the Sicherheitspolizei (SiPo; security police) and SD (but not the Orpo), were consolidated into the Reich Main Security Office (RSHA), headed by Heydrich.[63] This further increased the collective authority of the SS.[64]