Müller was head of the Gestapo office ( '' Geheimstaatspolizei '' ) in Oldenburg from 1935 until World War II . During the invasion of Poland , he served as one of four captains of the mobile killing squads ( '' Einsatzkommandos '' ) within '' Einsatzgruppe '' I , led by '' SS-Standartenführer '' Bruno Streckenbach . In total , eight '' Einsatzgruppen '' ( ) had been deployed in Poland . They were active until late 1940 , and composed of the Gestapo , Kripo and SD functionaries involved in extermination actions including Operation Tannenberg as well as '' Intelligenzaktion '' against the Polish cultural elites . Müller was appointed commander of the Gestapo Division 4 '' Krakau '' in the new General Government district ( '' Generalgouvernement '' ) two months after the attack
Intelligenzaktion
Intelligenzaktion
Bruno Müller