 So far, they think this was a lone wolf. What more do we know about the shooter? Well, so far, no ties to international terrorism have been uncovered, but authorities continue to look to see if there are any connections to domestic extremists, and they're searching to see if the shooter had any social media presence, and if so, whether there were any indications of violence or extremism. We're told he's a registered Republican, and as of yet, there's no signs of an extensive criminal background, but the question is why.