In this frame grab from video provided by WFAA, people are evacuated from Allen Premium Outlet, Saturday, May 6, 2023, in Allen, Texas. Law enforcement responded to reports of a shooting at the outlet mall, in the Dallas area. (WFAA via AP) — © Uncredited Posts on a Russian social network suggest a man who opened fire at a suburban Dallas shopping centre, killing eight people and wounding seven others, had planned the attack for weeks. Mauricio Garcia, 33, researched when the site in Allen was busiest — Saturday afternoons — and posted photos on social media in mid-April of...