The madman who killed eight people at a Texas mall had been in the US Army but got booted over mental-health problems. Mauricio Garcia, 33 — a security guard killed by cops after opening fire at shoppers in Allen, Texas, on Saturday — served in the Army in 2008 but was eventually “removed due to mental health concerns,” law-enforcement sources told local ABC 30. It was not immediately clear what those concerns entailed, the role Garcia served in before he was dismissed or when he was tossed out. In addition to his Army training, Garcia had undergone several firearms proficiency...