Two former U.S. attorneys said today they believe ongoing investigations into the dismissals last year of eight federal prosecutors could result in criminal charges against senior Justice Department officials.

John McKay, the former U.S. attorney for Western Washington, and David Iglesias, the former U.S. attorney for New Mexico, also said they believe White House political operative Karl Rove and his aides instigated the dismissals and ultimately decided who among the nation’s 93 U.S. attorneys should be fired. But the White House on Wednesday flatly denied the firings were instigated by the White House.