KPMG and the Wells Fargo board of directors knew the company had fake accounts on the books, but KPMG didnโ€™t flag it because the firm didnโ€™t regard it as relevant to the financial statement audit, according to a letter from U.S. Senators to audit regulators asking how that could be possible.

Sen. Elizabeth Warren and Sen. Edward Markey, both Democrats from Massachusetts, have asked the Public Company Accounting Oversight Board to look into โ€œthree pieces of troubling new informationโ€ they learned in doing their own inquiry to the Wells Fargo scandal. They say: