I think you have a mistake in the following paragraph:
"We also find out Doc let Johnny live the first time because Johnny was on a winning streak. And Doc considers it bad luck to kill a man when he's winning because it will bring Doc bad luck."
I think the last half of the first sentence should say "because Doc was on a winning streak".
I think you have a mistake in the following paragraph:
"We also find out Doc let Johnny live the first time because Johnny was on a winning streak. And Doc considers it bad luck to kill a man when he's winning because it will bring Doc bad luck."
I think the last half of the first sentence should say "because Doc was on a winning streak".