"GE bent the accounting rules beyond the breaking point, " said Ms. Schapiro's then-director of enforcement, Robert Khuzami, in an official news release.

WSJ: Imagination at Work

Ms. Adams was to oversee the payroll and accounting functions of GTI and eventually pay off any outstanding tax liabilities.

FORBES: Bishop Corletta Vaughn, Chief Apostle, Held Personally Responsible for Ministry's Payroll Withholding

HCA's recently improved earnings, Ms Bryan contends, are largely due to changes in accounting and billing models.

ECONOMIST: American hospital companies

In 1999, Ms. Adams discovered there was a problem with payroll tax accounting and payments with respect to GTI.

FORBES: Bishop Corletta Vaughn, Chief Apostle, Held Personally Responsible for Ministry's Payroll Withholding

"The language, which is a mix of accounting phrases, personal motivations and attempts to conceal, are very revealing, " Ms Joshi said.

BBC: Fraud email key phrases revealed by new software