Throughout 1937, Linnemann was transferred as a commander of the Kriminalpolizei from Berlin to Stettin, and was also attached to Hanover.
The GdP is one three trade unions for police employees in Germany, the other two being the Deutsche Polizeigewerkschaft - affiliated with the German Civil Service Federation - and the Bund Deutscher Kriminalbeamter, which is exclusively for members of the Kriminalpolizei.
At the same time, his activities in Germany and Romania got him the attention of the Kriminalpolizei.
Wandesleben entered the Kriminalpolizei after an unsuccessful time in studying in higher education.
However, due to their superior manpower, training and experience, the police conduct the vast majority of criminal investigations on their own.