When Mr. von Notz raised the Bild am Sonntag reports and asked for more detail, the demoted intelligence officer replied that he “did not know much more than what has been in the papers,” according to a transcript on a live-blog at netzpolitik.org, a website that tracks intelligence matters.

André Hahn, a lawmaker for the opposition Left party, asked Mr. Vorbeck whether he had a good relationship with Mr. Heiss — “at first,” Mr. Vorbeck answered — and whether he had ever been charged with betraying secrets. “Not then and not now,” Mr. Vorbeck replied, according to the netzpolitik blog.