SAN JOSE, Calif.—An employee who gunned down nine people at a California rail yard and then killed himself as law enforcement rushed in had talked about killing people at work more than a decade ago, his ex-wife said. “I never believed him, and it never happened. Until now,” a tearful Cecilia Nelms told The Associated Press on Wednesday following the 6:30 a.m. attack at a light rail facility for the Valley Transportation Authority. “When our deputies went through the door, initially he was still firing rounds. When our deputy saw him, he took his life,” Santa Clara County Sheriff Laurie Smith told reporters. The gunman had two handguns and 11 loaded magazines, the sheriff told NBC’s “Today” show on Thursday. A locker at the rail yard believed to be the gunman’s contained “materials for bombs, detonator cords, the precursors to an explosive,” Smith said. The number of people fatally shot …