The U.S. Attorney’s Office in Los Angeles has dropped the one remaining campaign finance charge against prominent Los Angeles trial attorney Pierce O’Donnell, best known to Hollywood as the litigator who repped Art Buchwald in the Coming To America lawsuit against Paramount. (That trial spotlighted the “unconscionability” of Hollywood accounting whereby a studio movie with $350M in revenues had no net profit. Pierce co-authored a 1992 book, Fatal Subtraction: The Inside Story of Buchwald v. Paramount about the case.) O’Donnell’s office revealed Tuesday that Judge S. James Otero today signed a stipulation order prepared by federal prosecutors to dismiss a felony charge of allegedly causing the treasurer of a political campaign to submit inaccurate reports. Coupled with Judge Otero’s decision earlier this month to throw out two other charges, the latest move means that O’Donnell is no longer facing any allegations. O’Donnell continued to rep clients ever since he was charged last summer with three felony counts of campaign finance irregularities. At the heart of the government’s case were allegations that O’Donnell had provided $26,000 in campaign contributions through employees of his law firm to the 2004 presidential campaign of John Edwards. (Full Disclosure: O’Donnell repped me in a 2002 lawsuit I filed against News Corp, Disney, and the New York Post. It was ultimately resolved.)