No one has ever been charged with the murder. The German federal prosecutor's office had listed
Andrea Klump and
Christoph Seidler of the
Red Army Faction as the only suspects. The
Federal Criminal Police Office (Germany) presented a chief witness, Siegfried Nonne, who later retracted his statements in which he claimed to have sheltered four terrorists in his home. His half-brother Hugo Föller, furthermore, declared that no other persons had been at the flat at the time. On 1 July 1992, German television broadcast Nonne's explanations of how he was coached and threatened by the
Verfassungsschutz, the German internal intelligence agency, to become the main witness. In the same year, the
Alfred Herrhausen Society was established to honour his memory. In 2004, the federal prosecutor dropped the charges against the Red Army Faction; the investigation was to continue without naming a suspect. Certain German and US media connected the assassination of Alfred Herrhausen to the Staatssicherheitsdienst (
Stasi) of the
GDR. hold a moment of silence for the death of Herrhausen. Some reports in the 2000s have claimed that future Russian president
Vladimir Putin, then a KGB agent in
Dresden, East Germany, was the handler of the Red Army Faction members involved in the assassination. However, a 2023 investigation by
Der Spiegel reported that the anonymous source behind those reports had never been an RAF member and was "considered a notorious fabulist" with "several previous convictions, including for making false statements". In 2008, journalist
Carolin Emcke published
Stumme Gewalt ("Mute Force"), a memorial to Herrhausen, her godfather, encouraging dialogues between groups in societies, without violence, revenge and disrespect. She received the
Theodor Wolff Prize for the text. ==In popular culture==