There is a meme circulating that Hitler de-funded the police so that the SA and other Nazi party paramilitaries could take over. This is false. The police embraced the Nazi takeover and paramilitaries took on the role of auxiliary police force in support of Nazi rule. 
After the Nazi rise to power in 1933, Hermann Goering was placed in charge of the police, but this was not resisted by rank and file. Police and Nazi paramilitaries merged together to form part of an integrated apparatus of security and oppression. From KL by Nikolaus Wachsmann:
In July 1933, the SA descended on the Berlin suburb of Köpenick to round up Social Democrats and Communists. Several dozen were killed and 70 were disappeared During the "Köpenick Week of Blood", police supported Nazi paramilitaries.
Not all police officers embraced the Nazis, but many rank and file rose within the ranks of the Nazi security apparatus. Arthur Nebe, head of the Berlin police force's narcotics branch, became head of the Criminal Police in 1936 and then led the death squad Einsatzgruppe B
The Weimar Era police were not always pro-Nazi, but once they came to power, the police did not act as a source of resistance to Nazi rule. The SS, not the police, were the key to the ideological race war of the Nazis, but police were essential to campaign against "asocials"
