Another Big Law firm based in Philadelphia has been pulled into a $30 million lawsuit involving Morgan, Lewis & Bockius and ex-client Towers Watson Delaware over alleged conflicts, as the parties spar over access to information about an underlying confidential settlement.

Towers used Morgan Lewis as litigation counsel on various cases beginning in 2009. In its complaint, filed just over a year ago in the Philadelphia Court of Common Pleas, Towers alleged that Morgan Lewis used its knowledge of the company to help one of Towers’ retirement plan users, Meriter Health Services, sue Towers. Meriter and Towers agreed to a confidential settlement, but Towers has alleged in its claims that it lost $25 million as a result.