. >> reporter: neighbor john sayjack says the shooter took care of himself. >> when he came back, the dog liked her better than him and he got extremely angry about it all and wouldn't talk to her anymore. >> reporter: while the home was burning, investigators say the shooter was carrying out his assault at the vta rail yard, killing nine coworkers. a survivor says he believes that people were targeted. >> he killed them all. he -- who he wanted, he made sure they were dead. >> reporter: at the rail yard, investigators found three semiautomatic handguns and 32 magazines. the search for a motive continues, but vta says the shooter was a highly disgruntled employee for many years. his father spoke to the "san jose mercury news," saying his son was bipolar, but the violence was unexpected. he apologized to the victim's families, telling the newspaper, i don't think anything i could say could ease their grief. i'm really, really very sorry about that. >> that was jean elle reporting for us this morning. and this morning, the union, atu local 265 as well as leaders within the vta are dispu