In case you saw the same police activity at WV Barnes & Noble this morning (we were at the Museum of Flight) — four police cars, people in handcuffs, store briefly closed (or so one would-be customer was told) because of it — here’s what WSB reader Liz later heard from store staff: it started as a shoplifting investigation, then appeared to involve credit-card fraud, and there was concern one suspect was armed. Ended uneventfully with up to 3 arrests.