RE: Shoot or pass?
Bowhunting for 40+ years and being in on dozens of other Blood Trails allows you to experience lots of things.
I always do an autopsy on any animal I find dead, whether I shot it or not. I have saw deer hit in the liver only that expired in less than 100 yards. I have also saw a buck my buddy shot right through the liver that was still very much alive after an hour. It had to be finished off. Well maybe it didn't have to be, but we did. I'd guess he would have been dead the next morning.
There are some major arteries in the liver and I'm sure that's where the differences are. You hit an Artery and that Deer is not living long IMO.
Dan