From Seattle station KIRO:
Suspect in custody after Burlington, Wash. mall shooting that left 5 dead
A suspected gunman was found and taken into custody Saturday night at about 6:30 p.m. after a deadly shooting in a Washington state mall. Authorities say the motive for the slaying is unknown.
Good - still no word on motive or background. The 48 hour rule still holds true.
UPDATE: They released his name: Arcan Cetin He is Turkish. Tyler Durdin at Zero Hedge went a screen-capped a bunch of photos of him playing around with guns - the social media accounts will probably go away really soon but the images are archived here: Washington Mall Shooter Caught: Suspect Is 20 Year Old Turk