Most of the war Criminal SS guys either died fighting, or got off somehow, most notably Mengele, who apparently flead to South America, and visited Germany (his family) under fake identitys several times without getting caught. Or suicide, there are rumors that some SS Batalions had Cyanide pills as regular part of their “equipment” towards the end of the war this was most certainly true, but there is no proof.

The Soviets and Nazis basically did the same to each other and viewed each other as lower than animals even before the war, eastern front was hell in all regards and for all soldiers, there were no rules at all, the things they did to each other is absolutely beyond what war was. (also each other’s general population and everyone not form said ethnicity, see what both did to Poland and such…)