Days before U.S. Capitol Police told House members that three Pakistani brothers who ran their computer networks may have stolen congressional data, their stepmother called Fairfax County, Virginia police to say the Democratic staffers were keeping her from her husband’s deathbed. A relative described her situation as being held in captivity for months while the brothers schemed to take their father’s life insurance and other assets. The brothers — who as IT professionals for Congress could read House members’ emails — allegedly used wiretapping devices on their own stepmother and threatened to abduct loved ones in Pakistan if she didn’t...