any new update on that front? the suspect may have targeted his specific victims? >> reporter: i spoke to the sheriff yesterday, she said that it appears as though he was choosing his victims, and that assessment is based on the fact that she said there was an individual here at this rail yard who wasn't an employee, it was a union official and according to the sheriff the shooter went up to this person and said i'm not going to kill you, and then proceeded to shoot other people. now that theory that he was targeting his victims squares with what we're also hearing from eyewitnesses, take a listen. >> i do know that he had a specific agenda and was targeting certain people. he walked by other people. he let other people live as he gunned down other people. >> reporter: now at this point authorities don't have a specific motive but they tell us that all signs now are pointing to workplace violence. they tell us that they still have a lot of work to do, both here at the scene as well as at the residence, trying to dig into this person's past to glean any piece of information that