Lothar Ackermann, lawyer Frank Nobis, Rudolf Richter, lawyer Heinz Walter Lindemann and Wilfried Ackermann (L-R) wait for the opening of a trial at the regional court in the western town of Hagen June 10, 2005. The oldest known bank robbers in German history, dubbed 'Grandpa Gang', are accused of stealing more than one million euros from different 14 banks. A German court sentenced the elderly trio on Friday to imprisonment for masterminding a string of robberies at banks across western and northern Germany over a 16 year period between 1998 and 2004.