The RSHA (Reich Main Security Office) came into existence on 27/9/39 after being separate offices of the SD (security service) and SS (nazi paramilitaries) since the mid 1930's. AMT I & AMT II were formed officially on 1/10/39 but reorganised completely after March 1941, heads of department were regularly transferred to different departments and the Einsatz Squads of paramilitary murderers when new countries were invaded as all had perceived 'undesirables' to be eliminated.
AMT IV was probably the most infamous of all the Nazi security apparatus, 'the Gestapo' (GEheime STAats POlizei) The secret state police, who were the instigators of all interrogation, imprisonment, murder and genocide in the nazi regime.
Captain Otto Prochnow, Doctor Sader
Prochnow lived in North Berlin, Seestrasse, alleged to have been recruited by the CIA after 1948.
typography of terror /arenhovel
OSS interrogation report for the Nuremburg war trials 1946