Is there an enemy invader actively performing military operations inside the country? In that case, I believe it’s typical for a nation to suspend its normal procedures, we don’t need our principle to hold in case of active invasion.

Otherwise, just don’t do war. It’s pretty simple. Especially when you have zero need for land.

Witness protection is a compensation for an inadequate and overly soft criminal justice system. If the person calling the hit fully expected to die by hanging for calling the hit, he would not call the hit.