Ironically, the law firm representing ABA Retirement, giant Sidley Austin LLP, is no stranger to facilitating tax avoidance.

FORBES: Informer

The Equal Employment Opportunity Commission last year sued 1, 600-attorney Sidley Austin LLP, accusing it of demoting 31 partners because of their age.

FORBES: Companies, People, Ideas

Earlier this month, the family retained a corporate law firm, Sidley Austin LLP, to argue an appeal that is expected to be heard this spring.

WSJ: Donated Land Is Battlefield