Cozen O’Connor is accusing a partner’s ex-client of using a complaint against the firm to delay a multimillion-dollar construction law arbitration, after the former client alleged that a group of lawyers handled conflicts improperly when they joined the firm from Pepper Hamilton.

Cozen O’Connor filed an answer June 30 in McNeil v. Cozen O’Connor, denying the claims. Henry McNeil had alleged that the firm gained an unfair advantage for its client, E.B. Mahoney Brothers, when it hired a group of construction lawyers from Pepper Hamilton. The group included two lawyers who had represented McNeil in an arbitration against Mahoney.