Check this out. Basically, this site is saying the same thing I am regarding how close Cheney was to his victim, but they actually had the time to do the math. The verdict? Whittington was probably more like 10-15 yards away, possibly as close as 5 yards.
As I said earlier, I was inclined to let this one go, as it sounded like a simple hunting accident, but I believe that some of the details are sketchy and someone should look into this further. Maybe Cheney is embarrassed he shot someone at such close range. Maybe he had more than one beer at lunch. Who knows? But something's definitely fishy.