The application of the in pari delicto defence in the
United States is subject to significant jurisdictional
variability. Case law reveals at least two different approaches to
the scope of the defence: (i) a narrow application available to
innocent but negligent (not complicit) defendants; and (ii) a broad
application available to both negligent and complicit defendants in
circumstances in which the plaintiff bears at least equal
responsibility for the wrong alleged.
For example, in 2010, the Supreme Court of Pennsylvania applied
in pari delicto narrowly in Official Committee of
Unsecured Creditors of Allegheny Health Education and Research
Foundation (AHERF) v. PricewaterhouseCoopers LLP, 607 F3d 346.
The members of senior management of a non-profit corporation
misstated financial results to conceal the corporation's
financial difficulties. Following discovery of the fraud and the
corporation's bankruptcy, a group of innocent unsecured
creditors brought an action