What I haven't heard mentioned, he was shot at dusk, (not enough light) if there was a scope, low light is a problem. Older man nearly 60, does he require glasses? Did he have them? The weapon is blameless, all blame resides with the user. again, (your target and beyond) How did he get to his hunting spot, did he drive? If he did, then we should ban cars, because he could not have shot the other hunter if he were not there to fire the weapon (logic, and by the way, the way the legal system determines fault. IE: If you are struck by another car, while driving without a licience, it is your fault not his. There could have been no accident if you had obeyed the law.) How about contributary negligence for the gas station attendant who sold him the gas to get there? We could get truly rediculas and blame the weapon itself for stalking that poor hunter, or we could simply blame the idiot who pulled the trigger on a target without fully understanding what he was shooting at. So which one do we hold acountable Retch? The weapon, or the man?
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.