In Stuttgart he rented a room with the family of Gotthilf Schlotterbeck, whose links with the Communist Party went back many years. The author and resistance activist Friedrich Schlotterbeck was a son of Gotthilf Schlotterbeck. It has never become clear just why, how and when Nesper became a Gestapo informant. A similar absence of clarity surrounds various aspects of his biography. It seems likely that the development was an iterative one, occurring over many months. A number of Gestapo employees subsequently stated that Nesper was already supplying information before the end of 1934. Irrespective of any information he may have provided to members of the security services in 1934, he clearly appeared on the radar for the senior political police authorities in what was by that time his home city, Stuttgart.
