I bet they used the Excuse that it's 'punishment' for the convicts didn't they?
Didn't they get sued like crazy though for doing that to the soldiers?
So no, very few cases have been tried. Besides, the people who committed these crimes are all dead now. Who do you suggest the victims sue? 'The government'? The people running the show now weren't even born when this was happening.
I do believe people should be compensated for their pain and suffering, and the government can and should take care of that. As far as bringing any actual people to justice for their crimes, that boat sailed long ago.