Jerry del Missier faces questioning by British lawmakers Monday. Del Missier, who recently quit his job as chief operating officer of Barclays, is also the country’s top bank regulator and was former CEO Bob Diamond’s investment-banking lieutenant. Del Missier is supposedly responsible for misinterpreting a message from Diamond to Barclays staff, telling them they’d been given permission by the Bank of England to falsify interest rates. Del Missier and Diamond quit on the same day, two weeks ago, as their bank became embroiled in scandal. Meanwhile, a Wall Street Journal investigation found that missteps doomed Barclays leaders.