Chinese human rights lawyer Xie Yang said, in his show trial, that he wasn't tortured into confessing. However, he had already informed people that any confession would be due to torture. Apparently he was tortured into denying that he had been tortured.

The charges against him amount to "campaigning for human rights". When a state charges someone with that sort of "crime", it is automatically an injustice.

The US also prosecutes people for political organizing. Unlike China, it tries to disguise this behind phony accusations, but that doesn't make it any less of an injustice.