Discharged from the service at the end of the war, Melcher became Police President of the city of
Essen on 29 September 1919. During the French
occupation of the Ruhr, he was temporarily expelled from the area between 1923 and 1925 by the occupation authorities. Resuming his post after the end of the occupation, he continued to serve as head of the police until 20 July 1932. On that date,
the takeover of the Prussian state government by the Reich under
Reich Chancellor Franz von Papen took place.
Franz Bracht, the
Oberbürgermeister of Essen, was named Prussian Commissioner for the Interior and he installed Melcher as Police President of
Berlin, succeeding the
Social Democrat Albert Grzesinski. In December 1932, Melcher announced a crackdown on the city's nightlife, in particular, dance halls and
nightclubs catering to homosexuals. This resulted in the closure of dozens of establishments, including the famed
Eldorado. However, soon after the
Nazi seizure of power on 30 January 1933, Melcher, who was a member of the
German People's Party, was replaced on 15 February 1933 by the
Nazi Party member
Magnus von Levetzow. On 29 May 1933, Melcher received the post of
Oberpräsident of the Prussian
Province of Saxony and, on 13 September 1933, he was named to the
Prussian State Council by Prussian
Minister president Hermann Göring. However, on 29 September 1933, he was replaced as
Oberpräsident by
Curt von Ulrich but retained his seat on the State Council until the fall of the Nazi regime in 1945. In 1934, Melcher was appointed to the Prussian Provincial Council from the
Rhine Province. He was assigned as a
Sondertreuhänder (Special Trustee) for the civil service from 1 January 1935, and subsequently was elevated to
Reichstreuhänder (
Reich Trustee) for the civil service from 19 October 1938 until May 1945. In 1937, he also functioned as the transition commissioner for the incorporation of the
Free City of Lübeck into the state of Prussia under the provisions of the
Greater Hamburg Act. Nothing is known of his post-war life. He died in Berlin on 14 October 1970. == References ==