To the first, what he did is completely wrong no matter what in a pre zombie world. In their current world, yes it's still wrong. But it's a bit of a gray area. My issue with what he did isn't because he shot Otis in order to get away. Forgiveable? Maybe, maybe not. It's wounding him that makes it a completely immoral and irreedemable act. Any argument that it was the most expedient way of dealing with it goes out the window since he had to struggle for the backpack. And any idea that it doesn't matter how he did it goes out the window because the whole scene was revealed while he was hiding evidence of the struggle, which he wouldn't have if he'd killed Otis outright. Shane's guilt is infinitely higher because of how he did it, even in zombie world. You can still be practical while being humane, and we're seeing evidence with others of them keeping to humane methods. That's my point, not that Shane shouldn't have killed him, but that Shane crossed a my h bigger line by only wounding him and letting him get eaten alive.