Eight people died and seven others were injured Saturday after a gunman opened fire at an outdoor mall north of Dallas, Texas, officials said. ALLEN, Texas -- Federal officials are looking into whether the gunman who killed eight people at a Dallas-area mall expressed an interest in white supremacist ideology Sunday as they work to discern a motive for the attack, a law enforcement official told The Associated Press. The official cautioned the investigation is in its early stages. Federal agents have been reviewing social media accounts they believe were used by Mauricio Garcia, 33, and posts that expressed interest...