Hajo Funke, a political scientist at Berlin's Free University, has been advising the parliamentary committees currently investigating the police's failure to track down the NSU, which up until now has been reported as having three members: Uwe Mundlos and Uwe Böhnhardt, both dead, and Beate Zschäpe, currently in custody. He said the evidence that more people were actively involved in terrorist activity was overwhelming, and he named the murder of policewoman Michèle Kiesewetter in 2007 as one example.
Missing files, ignored clues, dubious police informants - German police have a lot to answer for over the NSU murders. An investigation committee is trying to shed light on the scandal, but time is running short.
The 44-year-old man, named only as Thomas S., was a paid informant for the Berlin criminal police (LKA) between 2000 and 2011, Der Spiegel reported.
On May 19, 2011, Holger G.'s past caught up with him. Three old acquaintances stood in front of his home, a clinker-brick and gable-roofed house in the small town of Lauenau in Lower Saxony. They were Uwe Böhnhardt, Uwe Mundlos and Beate Zschäpe, a trio of neo-Nazis now known as the Zwickau cell, who are believed to have murdered at least 10 people between 2000 and 2007. They had simply turned up out of the blue, and needed G.'s help once again.