Former federal prosecutor Mary Beth Buchanan and her most recent law firm, Bryan Cave Leighton Paisner, face allegations that they covered up a whistleblower client’s use of “FBI surveillance software” to hack private patient data stored by LabMD Inc., a beleaguered medical testing company.

A lawsuit filed April 28 in Manhattan federal court accuses Buchanan, a former U.S. attorney in Pittsburgh, of violating the Ethics in Government Act and allegedly hiding that violation by advising a whistleblower client, Richard Wallace, to give incomplete testimony in a Federal Trade Commission enforcement action against LabMD.