By the end of World War II, Rössler was heading up the main office of the Ministry of Public Enlightenment and Propaganda before fleeing the Eastern Front to Saarland.
Wanting to remarry his wife, on 21 October 1946, he claimed under oath at the registry office in the small town of Luthe (since 1974 part of the city of Wunstorf) to have witnessed the death of Hauptmann Dr. jur.
He claimed to be Dr. Franz Richter, born 6 June 1911 in Smyrna (İzmir) in Ottoman Empire, studied philology in Prague, served as a student councilor (Studienrat), soldier from 1940–1945, not a former member of NSDAP, single, wanted to marry Rössler's widow and adopt the children.
He made up the story, as it would have been impossible to verify, knowing that the records office in İzmir had burned down during the September 1922 fire, and most of the files of the German administration in the Sudetenland had also been destroyed shortly before the end of the Second World War.
[2] Along with a number of other expellees from the DRP, he was a founder member of the Socialist Reich Party, which called for a restoration of Germany's historic borders and "National-Socialist fundamental principles".