This week's episode covers two criminal cases with bickering concurrences.  Rahimi v. U.S., holding that the Second Amendment does not invalidate a law disarming someone subject to a domestic violence restraining order, shows that a lot can happen in two summers, while Smith v. Arizona, holding that an expert witness cannot testify about a report the expert did not prepare, shows that twenty years is still not enough time to decide what testimonial means.  Law starts at (02:22).