Who is Warden Hal Moores from The Green Mile?

Warden Hal Moores is Paul's boss and good friend. Over the years, the two men and their spouses have grown very close. Hal's wife has a brain tumor, and he is terrified that she is about to die. When Paul shows up with John, Hal is terrified, but when Belinda is healed, he is forced to be awed and grateful.