Getting Away With Murder(s)

99% of those who carried out the murders in the Holocaust were never prosecuted; most were never even questioned. The vast number of those enthusiastic participants simply walked away at war's end - completely untroubled by justice. Even with an endless wealth of evidence to present to the courts, the Allies' pursuit of justice simply stopped, deciding not to proceed any further. Why?

99% of those who carried out the murders in the Holocaust were never prosecuted; most were never even questioned. The vast number of those enthusiastic participants simply walked away at war's end - completely untroubled by justice. Even with an endless wealth of evidence to present to the courts, the Allies' pursuit of justice simply stopped, deciding not to proceed any further. Why?