I don't have any such plans in the first place, since I run a sandbox campaign. My NPCs might, but I assume nothing about my players' reaction to those plans. When my players' characters got involved the NPC would react depending on the circumstances. Unfortunately in you're NPCs case he was incapable of reacting because he was unconscious. So the question is does this guy have any allies? How do they react to his death? How do other NPCs react to the situation? Perhaps the PCs end up wanted for the death of the noble by people back in the kingdom proper. Perhaps, depending on whether or not the constable survived, the people of the village might suspect the PCs for not only the noble's death, but possibly the constable's as well.
Bingo...