Watchdog: Transparency advocates see tough year, growing 'Windsorgate' scandal at EPA ahead

According to Christopher Horner, a senior fellow at the Competitive Enterprise Institute (CEI), there is substantial evidence that Jackson was not the only EPA official using illegal aliases. Horner detailed that evidence in a recently published book.

The scandal could explode later this month because a federal court has ordered the Justice Department to make public an estimated 12,000 "Richard Windsor" emails.

Horner - who, with CEI, filed the litigation that led to the court's order to make the Windsorgate emails public - is determined to get answers from Jackson on key questions:

"Since you imply that you only used 'Richard Windsor' for internal correspondence, what account did you use for corresponding outside the agency," he told the Examiner.