That's so sad. It's part of life but it's by far the worst part.Something similar happened to me a few days ago. I was visiting with a relative and found a baby alligator snapping turtle in their driveway. I went to check on him and he was alive, but he had been run over and part of his intestines were hanging out of his left side (the relative I was visiting had gone grocery shopping earlier that day and didn't relize he was in the driveway). There was nothing I could do for him, so I moved him to an area where he could be left alone from predators while he passed. When I went to check on him the next morning, he was dead.
God speed little turtle.
Tonight the cat dropped a baby snake so small I thought it was a worm on my doorstep. It was a goner, so it's been moved out to some tall grass. I hate outdoor cats.