BRENDAN O'BRIEN A 23-year-old bank employee armed with a rifle shot dead five colleagues and wounded nine other people at his workplace in Louisville while livestreaming the attack on social media, police said. The gunman was fatally shot at the scene, Louisville police said. It was unclear whether he was slain by police or took his own life. The incident marked the latest in a long series of mass shootings in the U.S. Louisville police identified the shooter as Connor Sturgeon, who joined the downtown branch of the Old National Bank as a full-time employee last year. Police said they…