One of my best friends is a State Trooper that has spent a lot of time at the border since Obama cut border patrol funding and made Texas pick up the tab. He said we wouldn't believe how many middle easterners are coming across the Mexican border. The wall or enforcement of the actual laws will help with both.
The cop that did the press conference I saw said they got that he was hispanic from the video.
Now they are saying he killed his ex GF, so it's not Islamic terrorism. Just a domestic abuse case that the guy happened to be from Turkey and killed 5 people in public.