Well it turns out he was not dead. I thought he was dead for sure because of his injuries and I had tossed a little stick at him to see if he would move and it hit him and he didn't move so I left him until my fiance got home. Well when he got home, we went out there and I didn't see him, I was like he's gone. My fiance was like no he's right there, he was there but he had moved, only a little bit. We had the shovel so we could scoop him up to move him and when we tapped him with the shovel he moved!!!!! He hissed a little bit but his jaw was messed up and he had lots of dirt in his mouth. I think maybe a hawk got him because we have a few around here. I don't believe it was a car since his skin and was basically torn off. Poor guy. I really think it was a hawk. Well we scooped him up anyway and put him on the other side of the fence where there are more trees and grass for him to crawl under. I just went and checked on him and he's gone so I don't know what will become of him. We had to move him from our yard because of the dogs. They are not venomous but I didn't want the dogs to mess with him. As it was Maggie was sniffing all around where he was before. Good luck little snake.