I believ it was Harry who made the mistake. He should have called out to the party when he saw they had moved away from him. Senile old geezer who wasn't paying attention to his surroundings.
Stay with your party, or put yourself at risk.
Sorry don't pull the trigger unless you have a clear field of fire.
They both may have erred, there's no way of knowing, but Vice President Cheney pulled the trigger. Need to know who you're hunting with.
A mistake was made, I'm glad he's OK, which should pretty much be the end of it. But it won't, a ping list for "CheneyShoots" would last for months.