That's ABC New's story and it's sticking to it:
Authorities suspect Ortega has been in the area for weeks, coming back and forth to the Washington Mall. Before the shooting, he was detained by local police at an abandoned house. U.S. Park police say Ortega may have spent time blending in with Occupy D.C. protesters.Tomorrow's story: No, he wasn't one of our beloved protesters. He was a ...gun nut!
For the love of God.