Annerose Zschape told Focus magazine said she expected the proceedings against her daughter, Beate Zschape, to be turned into a show trial targeting the entire radical right-wing movement.
"My daughter is in the eyes of many people already condemned," Zschape said. "I'm of the opinion that it is no longer about investigating the case objectively."
Beate Zschape faces charges in Munich she took part in the 10 slayings linked to two members of the National Socialist Underground. The slayings took the lives of nine people with immigrant backgrounds and were carried out by two gunmen who committed suicide in 2011, The Local.de said Sunday.
The trial of the younger Zschape begins April 17. Court officials have limited attendance to 50 spectators and 50 reporters with no live television coverage allowed.