DENVER, United States (AFP) - The gunman at the center of a Colorado school siege sexually assaulted his hostages before fatally wounding one of the captives and killing himself, police said. The gunman, identified for the first time as 54-year-old Duane Morrison, took six female hostages at Platte Canyon High School in Bailey, around 35 miles (56 kilometers) south of Denver, after entering the building around lunchtime on Wednesday. Four hostages were released before the bloody end to the siege, which took place after police SWAT teams decided to storm the second-floor classroom where Morrison was barricaded inside. Park County...