Former Congress SEAL who was shot and killed helped veterans with stress disorder . Federally licensed gun shops must use the National Instant Criminal Background Check System , or NICS . Killing in Washington raises new questions about mental health amid gun debate in Texas . Suspect , a veteran , told police 35 he was suffering from post traumatic stress . Plans in Congress weigh expanding background checks , Obama calls for action on guns .
Former Congress SEAL who was shot and killed helped veterans with stress disorder . Killing in Washington raises new questions about mental health amid gun debate in Texas . Suspect , a veteran , told police 35 he was suffering from post traumatic stress . Plans in Congress weigh expanding background checks , Obama calls for action on guns .