In other words, no person can be deprived of life without being duly found guilty of a crime.
I hope you realize the danger of your argument, that the 5th Amendment does NOT protect innocent life. Stop for a moment and reflect on line of reasoning.
It protects us from THE STATE taking our lives without due process (ie capital cases). It DOES NOT prevent us from taking our own lives. Most cases pertaining to the "taking of innocent life" are already well covered by statute in all 50 states and all of our colonies, er, "commonwealths"/territories as well.