He brought chains to lock the doors so no one could get out.
Yeah, it was premeditated.
I have always said that squads of gunmen dispersed across the country to commit “random” shootings would be a diabolically effective means of terrrorizing our open society—no nukes, bombs, or military training required. Remember the hysteria caused by the DC Sniper? You couldn’t pump gas from Boston to Richmond without bobbing your head. Imagine that times 20.
See #214.