It can't work, the way it was designed, in a case like this, because of the massive inherent conflict of interest. The government is accused of committing a crime, so the government decides whether there should be an indictment. Then the government will conduct a trial, and pronounce a sentence. You can't reasonably expect anyone to accept that as justice. Sometimes people do, because of their childhood government indoctrination, but you can't depend on that.

"But whether the Constitution really be one thing, or another, this much is certain--that it has either authorized such a government as we have had, or has been powerless to prevent it. In either case, it is unfit to exist." --Lysander Spooner, 1867