How does someone get amnesty or prove human rights violations toward the country he or she is leaving?

Answer 1

The first step is to find out if what happened to you was a violation in the first place.

This means look it up, research, read and then point out. Then hire a lawyer. If you let the lawyer do all the research you may end up with just a big bill and "no your rights were not violated, you don't have a case."

You are leaving or living in the country? If you are a tourist you should read about the foreign country prior to visiting. These sites can be found by simply typing in the country's name and go to foreign consulate site to get a list of what you can and cannot do there.