main field of engagement now was missions to release imprisoned RAF members. To weaken the organization further the government declared that some RAF inmates would be released if the RAF refrained from violent attacks in the future. Subsequently, the RAF announced their intention to "de-escalate" and refrain from significant activity. The last action taken by the RAF took place in 1993 with a bombing of a newly built prison in Weiterstadt by overcoming the officers on duty and planting explosives. Although no one was seriously injured, this operation caused property damage amounting to 123 million Deutschmarks (over 50 million euros). The last big action against the RAF took place on 27 June 1993. An agent of the Federal Office for the Protection of the Constitution (the West German domestic intelligence agency) named Klaus Steinmetz had infiltrated the RAF. As a result, Birgit Hogefeld and Wolfgang Grams were arrested in Bad Kleinen. Grams and GSG 9 officer Michael Newrzella died during the mission. Due to a number of operational mistakes involving the various police services, German Minister of the Interior Rudolf Seiters took responsibility and resigned from his post. Dissolution On 20 April 1998, an eight-page typewritten letter in German was faxed to the Reuters news agency, signed "RAF" with the machine-gun red star, declaring the group dissolved: In response to this statement, former BKA President Horst Herold said, "With this statement the Red Army Faction has erected its own tombstone." Legacy Horst Mahler, a founding RAF member, is now a vocal Neo-Nazi and Holocaust denier. In 2005, he was sentenced to six years in prison for incitement to racial hatred against Jews. He is on record as saying that his beliefs have not changed: ("The enemy is the same"). In 2007, amidst widespread media controversy, German president Horst Köhler considered pardoning RAF member Christian Klar, who had filed a pardon application several years before. On 7 May 2007, pardon was denied; regular parole was later granted on 24 November 2008. RAF member Brigitte Mohnhaupt was granted release on five-year parole by a German court on 12 February 2007 and Eva Haule was released 17 August 2007. In 2011, the last imprisoned RAF member, Birgit Hogefeld, was released on parole. Police in Europe investigating the whereabouts of Ernst-Volker Staub, Burkhard Garweg and Daniela Klette stated that a search had been made in Spain, France and Italy. This followed reports that they