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We are raiding the Audio Long Read archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2019: The G\xfcrtel case began with one Madrid mogul. Over the next decade, it grew into the biggest corruption investigation in Spain\u2019s recent history, sweeping up hundreds of corrupt politicians and businessmen \u2013 and shattering its political system. By Sam Edwards. Help support our independent journalism at theguardian.com/longreadpod