That's true for US citizens. But not so much otherwise.
Edit: Someone disagrees? Consider Guantanamo Bay, third-party renditions, and drone strikes. If China did drone strikes, there'd be a huge outcry.
The just get disappeared into Belmarsh and extradited to who knows where for telling the truth about the US military murdering civilians including journalists from a helicopter gunship.
How about renditions (extra judicial disappearings), black sites and extra judicial drone strikes?
Usually, but they do get into unfortunate accidents from time to time.