Federal prosecutors handling the case of Philadelphia union leader John Dougherty and several co-defendants claim to have identified a conflict of interest involving lawyers for two of the accused.

In a memorandum filed March 8 in the U.S. District Court for the Eastern District of Pennsylvania, prosecutors alleged that because defendants Marita Crawford and Bobby Henon are represented by the same firm—McMonagle Perri McHugh Mischak and Davis—a potential conflict could arise during trial.