Numerous writers, most recently Emily Bazelon of Slate, have touted the Brice Harper case from Montana as evidence against the castle doctrine, which allows people to use lethal force when it’s necessary to keep intruders off their property. These accounts tend to minimize the threat that Harper faced when he shot and killed Dan Fredenberg, and while it’s a difficult case, it hardly proves that the castle doctrine is bad policy.Harper was in some sort of relationship (he refused to call it an “affair†in interviews with police) with Dan Fredenberg’s wife, Heather (who said it was “pretty muchâ€...