You can roleplay dieing from your injuries in bed after the whole incident occured? After all you are rolplaying your your own character not someone else's character.
Dying in bed after a battle or the like should not be an issue. After all the game only tells you which unit injured you, not that a noble did. If you want to RP dying after a infiltrator attack, I can't see a problem with that either. The infiltrator made the choice to assault you.