Lawyer Thomas Walther, 78, gets prickly when he hears criticism of German courts putting elderly surviving Nazis — many over 90 years old now — on trial. “No one voices any doubts when charges are filed over a murder after 30 years,” he says. “But the prosecution of old men and old women is somehow viewed as problematic after 75 years, even if it’s about 1,000 or 5,000 murders in which active assistance was provided by the accused.” Justice has “no expiry date,” stresses the lawyer, who has led the way on a series of twilight justice cases in Germany against the last