Sullivan & Cromwell has taken its legal battle with Electronic Evidence Discovery Inc. (EED) to state Supreme Court in Manhattan while the Kirkland, Wa.-based e-discovery vendor has filed its own lawsuit against the New York law firm in state court in Seattle.

Sullivan & Cromwell first sued EED last month in the Southern District of New York, alleging the company, which the law firm had hired to provide document services on a major litigation, had consistently missed deadlines and prepared the wrong documents for production to opposing counsel. The firm asked the court to rule that EED was not entitled to $710,000 in outstanding bills.