Horst Mahler is currently serving a 12-years sentence for ‘Volksverhetzung’ (‘inciting popular hatred’) and Holocaust denial.

http://henrymakow.com/2015/06/nazi-granny-faces-jail.html

On February 21, 2009, Mahler was sentenced by a Munich court to six years’ imprisonment without possibility of reduction or bail. During the reading of the verdict, the judge said that Mahler had proven “not able to be re-educated” and declared that the “nationalist rattle” of and “nonsense spread” by Horst Mahler should stop.[21] On March 11, a Potsdam court then sentenced the 73 year-old Mahler to an additional five years’ imprisonment for Holocaust denial and banalization of Nazi war crimes. Mahler was adjudged an escape risk, so the sentence was carried out immediately.[22]

http://en.wikipedia.org/wiki/Horst_Mahler