If the weather permits the deer should be good till morning. If u heard the deer go into the water, that would be the first place to look. Many deer when shot will head to water to help with the pain. I my self have killed many that have ended up by or in the water. Also deer will come back to a trail. I shot at some does on a gas line one day, i missed but about 30 mins later they came back to the gasline.