This bit:
It's not true.
Notwithstanding the fact Cohens v. Virginia (1821) also upholds the fact that state law does not override federal law; certainly not rights.
Brown was deprived of life when he chose to assault a cop who, by law, had a legal right to protect himself and the community.
The fifth exists to protect citizens against unwarranted prosecution. Had Brown intentionally killed by a cop (or other government authority) without arrest, trial, etc, that would be a violation of the fifth.
In this instance, the right to self preservation would have existed even if Wilson had not been a cop. It's part of that inherent right to life you claim doesn't exist within US law. Based on your attempts to twist the fifth to find fault in the US system, no person would have such right to self preservation. A court would decide if they had that right after they were possibly dead.
You may want to better inform yourself about the facts. Wilson's case was handled by a state court and was not a federal proceeding.