"I am concerned that IndyMac's financial deterioration poses significant risks to both taxpayers and borrowers," he wrote. The bank "could face a failure if prescriptive measures are not taken quickly."
That public warning prompted depositors to pull $1.3 billion out of accounts between June 27 and Thursday.
"This institution failed today due to a liquidity crisis," John M. Reich, director of the OTS, said at a news conference Friday afternoon. "Although this institution was already in distress, the deposit run pushed IndyMac over the edge."
Schumer said in a statement that the cause of IndyMac's failure was "poor and loose lending practices" that should have been prevented by more active regulation. Later, a Schumer spokesman said: "Mr. Reich, a political appointee, should be spending less time playing politics and more time doing his job."
IndyMac is the second-largest financial institution failure in U.S. history, following only Continental Illinois Bank, which had assets of about $40 billion before it was shuttered in 1984. It is the fifth FDIC-insured failure of the year. Reich emphasized that though other financial institutions remained on the agency's danger list, he believed most of them would be able to work their way back to solvency.
"The IndyMac situation is unique. It does not signal a direction for the industry as a whole," he said.
IndyMac's board boasts a number of California luminaries. Among the directors, according to a proxy statement the company filed in March, is Pat Haden, 55, a former star quarterback for USC and the Los Angeles Rams, who has been a partner of Riordan, Lewis & Haden, the investment firm founded by former Los Angeles Mayor Richard Riordan, since 1987.
Other directors include Lyle E. Gramley, 81, a former governor of the Federal Reserve; Bruce G. Willison, 59, former dean of the Anderson Graduate School of Management at UCLA; and Lydia H. Kennard, 53, former executive director of Los Angeles World Airports, which operates Los Angeles International.
IndyMac had been operating under close regulatory scrutiny since January, when the OTS determined that the company was in ill health. The bank lost $614.8 million in 2007 and $184.2 million during the first quarter of this year, largely as the result of souring home loans.