Your deer is probably there waiting if shot in the vitals as you describe. A Coleman lantern could even allow you to find it tonight. Also, a good LED flashlight might work, but I think the Coleman lantern is the best. Just start where you see blood, and follow it, marking where you last found blood with some large object.
thats what i was going to do but it didnt leave a blood trail. but im 100% sure its dead. my spot is about an hour away from my house. if i dont find it theres always 2morro. because at this spot every morning usaully sucks. But when the sun starts going down about 5-10 deer come out. But yeah if i dont find it im sure ill drop one 2morro.