Christian Brueckner, 48, who is currently serving a seven-year prison sentence in Germany for the 2005 rape of an American woman, is set to be released on September 17.
Christian Brueckner was confronted as he left the court Germany after being convicted of insulting guards at the prison where he is serving a seven-year sentence for rape.
Christian Brueckner is currently in German jail for raping a woman in 2005 in the part of Portugal's Algarve region where three-year-old Madeleine McCann went missing in 2007.
Christian Brueckner , 48, is the main suspect in the disappearance of three-year-old Madeleine McCann, who vanished from a holiday apartment in Praia da Luz, Portugal, in May 2007.