On 2 June 2012, Heinz Fromm resigned as the boss of German intelligence.
German spy chief quits over neo-Nazi investigation scandal / Errors in Neo-Nazi Investigation: German Spy Chief Quits over Botched Terror Probe
In November 2011, an inquiry began into neo-Nazi terrorism in Germany.
The police had discovered, in a burnt-out caravan, the bodies of Uwe Mundlos and Uwe Böhnhardt, the leaders of a neo-Nazi terror gang.
Now, information has been leaked to the media that Fromm's agents destroyed and altered files about the neo-Nazi gang.
In the last few years, the gang has murdered a police officer, shot dead nine immigrants, carried out two bomb attacks and robbed 14 banks.
When the gang shot immigrant Turkish and Greek street vendors and exploded a nail-bomb in a Turkish district of Cologne, the police initially blamed 'gang warfare'.
Politicians have now suggested that that neo-Nazis may be working for German intelligence.
After World War II, the CIA and NATO reportedly made use of Nazis to carry out acts of terrorism, as part of Operation Gladio.
The recently destroyed documents contained information on members of the National Socialist Underground (NSU).
Italian intelligence services tipped off German intelligence about a meeting of European neo-Nazis in the Belgian town of Waasmunster in 2003.
In 1972, 11 Israeli athletes were massacred at the Munich Olympic Games.
Newly released intelligence files show that the massacre of the Israeli athletes was carried out by German neo-Nazis.
Reportedly, the German neo-Nazis worked with 'Black September'.
Two Israelis died in the hostage-taking. Nine were killed during the bungled rescue attempt by German police.
Abu Daud, a Palestinian linked to the attack, travelled to Germany in July 1972.
Abu Daud worked alongside Willi Pohl, a German neo-Nazi.
According to the magazine Der Spiegel, there is no evidence the intelligence services made any attempt to find or arrest Daud.
Pohl is now a crime writer who has assumed a new name.