Nehm studied law at LMU , the University of Freiburg and the University of Kiel . He was appointed a federal judge at the Federal Court of Justice in 1991 . As an Attorney General , he was widely regarded as having sometimes taken politically unpopular but legally stringent decisions . During his time in office , he investigated the German-based perpetrators of the September 11 attacks
September 11 attacks
September 11 attacks
Kay Nehm