August Hanning, who led Germany's BND foreign intelligence agency from 1998 to 2005, was arrested Tuesday morning at his home near Münster on charges of espionage, disclosure of state secrets, attempted treason, and acting as a secret service agent. The federal prosecutor's office described an alleged scheme stretching back to 2010 in which Hanning's former chief of staff, identified only as Manfred D., systematically funneled approximately 2,000 classified BND documents to his former boss in exchange for payment. The architecture of the alleged betrayal is striking for its longevity and access. Manfred D. served as chief of staff to multiple successive BND heads from 2012 to March 2026, meaning he occupied one of the most sensitive positions in German intelligence for over a decade while allegedly operating as Hanning's private source. The documents were classified for exclusive internal BND use. Hanning allegedly leveraged this material for his private consulting work — converting state secrets into commercial advantage. The case escalates beyond domestic corruption. Prosecutors allege Hanning maintained close contact with a representative of an unidentified foreign intelligence service, to whom he passed political information partially derived from the documents Manfred D. supplied. The prosecutor's office declined to name the foreign service, a detail that will dominate German political and intelligence discourse in the days ahead. The identity of that service will determine whether this is a story about greed or about geopolitical betrayal. The investigation reportedly originated from Hanning's connection to the high-profile trial of businesswoman Christine Block, suggesting prosecutors stumbled onto the espionage trail through a separate proceeding. This is not the product of a foreign intelligence tip or a defector — it appears to be a case that unraveled sideways, which raises uncomfortable questions about how long the BND's own counterintelligence apparatus failed to detect a pipeline running from its chief of staff's desk to the outside. Marc Henrichmann, chair of Germany's parliamentary intelligence oversight committee, delivered the expected line: "Whoever allies themselves with the enemies of our liberal democracy will be found out." But found out after 14 years and 2,000 documents is not a reassuring timeline. The investigation was triggered not by internal security mechanisms but by an adjacent legal proceeding. DW's chief political editor Michaela Küfner described this as Germany's "biggest espionage scandal of the century unfolding in real time." That framing is not hyperbole. A former intelligence chief using his ex-aide — still employed in the most sensitive BND role — to extract classified material for personal profit and foreign consumption represents a systemic failure, not an individual one. Both suspects are expected before an investigating judge Tuesday and Wednesday. The structural question is not whether Hanning and Manfred D. are guilty — that is for courts. The structural question is how a pipeline of 2,000 classified documents operated for roughly 14 years inside Germany's premier intelligence agency without triggering internal alarms. The answer to that question will matter far more than the verdict.