No, it doesn't.
Because they chose to shoot the deer illegally in the first place, they then had to kill it in an extremely painful way - repeatedly stabbing it with utility knives, apparently.
If this had happened incident to a lawful hunt, and the supposedly dead deer had awakened, it would be different. That would be sad, but not criminal.
Their illegal act in the first place is what resulted in the messy way in which the deer was killed.
Tough luck for them.