I'm not making any accusations, but I do find the sisters comments hilarious.
She KNOWS he wasn't involved because he wasn't anywhere near that area, as far as she knows. And he has a good heart? We're talking about the murder of a baby, here. If he didn't do it, you better come up with a better alibi than that!
On another note, it is absolutely sickening that anyone could point a gun at an innocent person, much less a baby.