I suggested this in-game before to have some kind of examining feature to determine the time of death, not to pin-point precision, but a rough estimate. Such as, "The corpse is still warm, this person died less than a minute ago!", "The corpse has maggots and looks rotten, this person died more than one day ago." It would really make me feel safer knowing that the body I just looked at wasn't killed exactly then, so I can safely stroll past it without having to keep my eyes peeled every second looking for a potential gunman.