The right of Fifth Freedom, gives the person authority to eliminate a person(s) without any Legal or Governmental consequence.
1. Kill anyone without consequence.
2. Eliminate target with no hesitation.
3. To kill someone with disregard to Law or Political hostilities.
"Within the fictional world of Splinter Cell, this unofficial Fifth Freedom allows an operative to disregard any law, agreement, or framework of ethical behavior in order to accomplish his mission. As Dermot P. Brunton put it, "all means are acceptable." For example, the operative may kill in combat or by assassination, may torture or kidnap people, may deploy on U.S. soil, and may spy on other U.S. government agencies. Fifth Freedom is also used as a verb. To "Fifth Freedom" someone is another way of saying to kill someone." - Wikipedia, Fifth Freedom.
NOTE : The Fifth Freedom is unoffical, but many use it in war and in personal situations.
Splinter Cell - In the game Splinter Cell, Sam Fisher an operative of the fictional Third Echelon is commisioned witht he fictional right of Fifth Freedom.
It is also used in Noam Chomsky : The Culture Of Terrorism.
It is also stated in one of Franklin D. Roosevelt's speeches.