They are considering this workplace violence. Hostages were taken but they are safe now. http://www.foxnews.com/us/2016/06/14/report-active-shooter-possible-hostages-at-amarillo-texas-walmart.html
The gunman was Somalian. https://www.rawstory.com/2016/06/walmart-shoppers-evacuated-from-texas-store-after-shooter-takes-hostages/
The gunman had some letters written in Arabic in his car. The gunman was a Walmart employee of Somali descent. Upon searching the deceased suspect’s car it was revealed that writings in Arabic were discovered. Currently authorities are waiting for a Somali translator to find out more.http://universalfreepress.com/2016/walmart-shooter-somali/#