Sometimes, retribution (and by this I mean pure, unmitigated vengeance) is a perfectly appropriate part of our criminal justice system. This is true even if all the other goals of that system would say forget it.
I am glad that Germany has commenced the trial of a 92-year old former member of the Nazi Waffen-SS who is alleged to have murdered a resistance fighter near the end of WWII. Even though they are undoubtedly old men too, I am even more pleased that Germany may proceed against 30 alleged Nazi guards for their role at Auschwitz seven decades ago. See here. My only regret is that Germany will not employ the death penalty should any of these men be found guilty.
Justice requires that we never forgive and we never forget the offenses these men are accused of committing. It is late but it is not too late.