Just war theory makes killing lawful only for the just side. [contrarian]
The solution lies in nothing less than a forceful distortion of the law of warfare. To find a basis for a right to unilateral murder, there is only one theoretical possibility: to make the jus in bello follow from the jus ad bellum, making the former conditional upon the latter in a monopolistic way modeled upon an unconventional melding of police and penal practice, so as to reserve for the “just warrior” the right to kill without committing a crime.
Grégoire Chamayou, A Theory of the Drone, loc. 531