If you had told me back in high school that reading Fyodor Dostoyevsky’s “The Brothers Karamazov” could possibly make me a suspect in a homicide investigation, I might have kicked my feet a little more when my teacher assigned it. In Craig Johnson’s newest addition to the Longmire series, “The Brothers McKay,” we see our stalwart sheriff tackle the suspected homicide of Pepper McKay, wealthy ranch owner and the one victim everyone within a 50-mile radius had a motive to kill.