PROVIDENCE, R.I. (AP) — Lawyers for a woman charged in a $10 million kickback scheme targeting the Navy are raising the possibility that unspecified members of Congress could be called to testify for the defense in next month’s federal trial, though members of their staffs say they haven’t been contacted about the case.

Mary O’Rourke is one of several people charged in the case. She is set to go to trial June 4 along with her boyfriend, Ralph M. Mariano, a former Navy employee from South Arlington, Va., accused of being the ringleader, and his father, Ralph Mariano Jr., of North Providence. The younger Mariano and O’Rourke are charged with counts including conspiracy, theft of government property and wire fraud. Mariano Jr., who is in his 80s, is accused of tax evasion.