Do the dead bleed?
If you cut a dead person and turn them the blood may drain out, but in order to actually bleed you need a heartbeat. You bleed because your heart is pumping blood through your body. You can actually have a good idea of how long it took someone to die by the amount of blood surrounding them, assuming they died with a bleeding injury. If there is A LOT of blood around the body it took them a while to die, but if there isn’t much blood it didn’t take very long, because like I said once the heart stops beating the bleeding stops.