You can be deprived of "LIFE, liberty, or property" through "due process of law", which is how we come to the Death Penalty. Also, killing in war or self-defense is held universally to be legal in U.S. law. The "Right To Life", as such, is ONLY mentioned in the Declaration Of Independance, which, although a wonderful document in and of itself, is NOT a statutory or legal document.
The vast amount of killing the human race engages in, both intentionally and otherwise, of ALL AGES of people, pretty much shows how "sacred" life is to humans in general. Essentially, you DO have the Right To Life...so long as you can KEEP yourself alive.
A brutal reality, but one with which all life has lived with since the primordial ooze.