A US company that contracts with the federal government to conduct background and security checks has sued three of its former employees recently and accused one of them of taking confidential military documents.

US Investigations Services has filed a lawsuit against Susan Callihan; Sarah Baucom and Sharon Vernick on the ground that they took proprietary information to competitors. Among the claims are that Callihan, who had a Top Secret federal security clearance, e-mailed to her personal address a “highly confidential” military operations manual along with Excel spreadsheets that contained “detailed proprietary information” including names of people being investigated and their military branch.