UPDATE: I stopped at Tom's house on my way to Virginia. Unfortunately, he's still in the hospital. He had surgery yesterday to take skin from his stomach and graft it to his leg.
After describing the accident scene to his wife, she thanked me for being there and saving his life. At that point, I asked the question I'd been wondering about for a week, "Do we know that the tourniquet was actually needed?"
She said, "Oh, yes," and went on to say that on the helicopter they asked Tom where he got the tourniquet. When he told them what happened, they said, "You're lucky he was there. He saved your life."
As I was leaving his wife gave me a big hug and said, "If you get back this way, you call us. You now have family in West Virginia."