Family members of those victims lashed out at Boeing's chief executive, Dave Calhoun, during a Senate hearing that was convened this week about the company's efforts to address recent quality and safety lapses. Senators confronted Mr. Calhoun about issues such as forged inspections of critical plane parts and company retaliation against employees who raised safety concerns. The Justice Department began preparing the families of victims of the Max 8 crashes for the announcement last month, meeting with them for about six hours to update them on the case and to hear their concerns.