LOS ANGELES — A Los Angeles judge has blasted one of the nation’s leading plaintiff firms in asbestos litigation for attempting to obtain an upper hand in the case through what he called a “type of judicially sanctioned extortion.”

The judge’s statements came in a lawsuit filed by Waters & Kraus on behalf of a Los Angeles man who died of mesothelioma in December 2007. Six months before, the man had been deposed in Texas, where the case was first filed. The case has since been re-filed in California.