The 1MDB scheme, McMurry’s team must have soon realized, was of a whole different magnitude. For one thing, Low just seemed so brash: His money-laundering techniques, although sophisticated, had been carried out through major banks, and there was a solid money trail. This was easier to deal with than Pakistani money launderers, who often would go into hiding for years and make their funds disappear through the informal hawala money-transfer network. Then there was the scale: The 1MDB affair was shaping up as the single largest financial scam of all time.