ORANGE, Calif.—A man was charged Friday with murder and attempted murder in a shooting rampage at a Southern California office building that left four people dead, including a 9-year-old boy. Orange County prosecutors said Aminadab Gaxiola Gonzalez, 44, was charged with the attempted murder of two police officers after firing at them when they reached the scene of the shooting late Wednesday and the attempted murder of a woman who was wounded but survived. Authorities said Gaxiola had chained the gates to the business complex closed with bicycle cable-type locks before the attack. “The taking of the life of another human being is the most serious of crimes and the slaughter of multiple people while they were essentially locked in a shooting gallery is nothing short of terrifying,” District Attorney Todd Spitzer said in a statement. Gaxiola was expected to be arraigned Friday from the hospital, where he is in …