MacKenzie Bates, left, 17, of Allen, Texas, embraces her mother Rochelle where flowers were left at the scene of a shooting the day before at Allen Premium Outlets on May 7, 2023 in Allen, Texas. According to reports, a shooter opened fire at the outlet mall, killing eight people. The Bates, who were shopping at the mall at the time of the shooting, had returned to retrieve their vehicle from the parking lot. (Stewart F. House / Getty Images) Federal officials are looking into whether the gunman who killed eight people at a Dallas-area mall expressed an interest in white...