An audit last year revealed that there was $186,000 missing from a fund he administered.
An internal audit has revealed an additional $3.3bn (£2.2bn) of improperly reported earnings - taking the total to more than $7bn.
I'm saying that despite what your audit might have revealed you should still have considerable faith in us.
As recently as 1983, an audit of reports by the Chicago police revealed widespread underreporting.
The audit revealed that the city's money was not protected by bonds, as required by law.
But the audit revealed that the district had spent $8 million more than it took in.
In the early 1990s, an environmental audit of Patagonia revealed the surprising result that cotton was the worst product for the environment.
Some audits have revealed financial mismanagement, especially at the local level.
An audit by the new administration also revealed improper spending of health insurance benefits that cost the city more than $1 million.
In 2008, an audit of the authority revealed billing regularities.