Until one has "hands on" the deer it can be hard to determine if the injury was mortal or not. Wouldn't be the first time an animal covered significant ground despite being mortally wounded.
I've only killed one injured deer. He'd been injured (best guess) that morning and it was afternoon. He had a 38 cal pistol round (perhaps PCC) wound in the broiler room, had eluded the shooter and found himself a tree to lie under while he slowly expired. Didn't know for sure he was injured, just didn't act alert. Yes I tagged him and didn't make a poll of who may have shot an unrecovered deer with a pistol round.
I determined that day I would always use more gun than a pistol/PCC for a broiler room shot.