'Nonchalant' suspect arrested after Colorado Walmart triple-slaying

By Keith CoffmanTHORNTON, Colo. (Reuters) - Police in Colorado on Thursday captured a man accused of walking calmly into a suburban Denver Walmart and fatally shooting three people at random before driving away.Scott Ostrem, 47, was taken into custody without incident a day after the shooting following a tip from the public, the Thornton Police Department said.Police said they have yet to establish a motive for the rampage and that Ostrem had only "a minimal criminal history."Video broadcast fro