That's kind of crazy of Amnesty to take this sloppy approach to their definitions. While systems are not perfect by any means, the US is in a totally different category with respect to corruption, rule of law, judicial independence, even conviction rates than other countries. We have a trial by jury here - does Amnesty not even look at what is going on in other countries with judiciaries that are actually totally corrupt?
I would be interested in some of the examples of tourists and visitors being killed by police - I pay somewhat close attention to that. There are issues of violence that really shock visitors to the US, including killings, but I hadn't realized the police were playing such a big role. Could you give some examples of visitors being killed by police (ie, the issue Amnesty is warning people over?).