Attorneys for a Columbus, Ga., defense lawyer acquitted last November of federal money-laundering charges have accused federal prosecutors of relying on false testimony and a "rogue agent" with the Drug Enforcement Administration to help them make their case.

The allegations are found in a court pleading filed on behalf of Columbus attorney J. Mark Shelnutt, who is suing the federal government to reimburse him for more than $225,000 in legal fees he spent defending himself against the charges.