By Brendan O’Brien (Reuters) -A man was arrested on Tuesday after police said he broke into the Colorado Supreme Court building in Denver with a handgun and set a fire in a stairwell. Police arrested Brandon Olsen, 44, on charges of arson, robbery and burglary, saying he had fled the scene of a car crash shortly after 1 a.m. before shooting out a window of the Ralph L. Carr Colorado Judicial Center in downtown Denver and breaking in. Police say Olsen took keys from an unarmed security guard and made his way up the building’s seventh floor, where he fired shots out of windows and lit a fire in …