Apparently, it was a daughter of WMB not WMI according to some documents and JPMC knew that cash was there and grabbed it $30 Billion, quietly and quickly changed the name and washed that cash and all the ATM cash (Billions) into their negative balance sheet. Obviously if WMBfsb was WMB's subsidiary and cash rich (which they were) then WMB was very solvent and the FDIC seized a solvent bank.
Alan Fishman CEO sent a letter about this but Sheila and Jamie already had a deal.