Philadelphia union leader John Dougherty has sued Pepper Hamilton, alleging the firm illegally attached a confidential FBI affidavit to a motion it filed on behalf of client Philadelphia Media Network in defense of a defamation suit Dougherty brought against the company. The complaint further alleges that the contents of that document formed the basis of a story published by The Philadelphia Inquirer and Philly.com, both of which are owned by PMN, soon after the motion was filed.

In addition, the complaint alleges Pepper Hamilton has used information it received during the course of its previous representation of Dougherty against him.