In a remarkable screw-up, a Department of Justice official today accidentally distributed to the media a document containing the names of nearly 20 confidential witnesses interviewed during a federal probe targeting the operators of a fraudulent investment scheme. In announcing felony charges against two men for their roles in an alleged $15 million Ponziesque swindle, the spokesman for Chicago U.S. Attorney Patrick Fitzgerald (he of Rod Blagojevich- and Scooter Libby-prosecuting fame) e-mailed reporters a 62-page U.S. District Court complaint filed against John Walsh and Charles Martin, principals of the now-defunct One World Capital Group. Included in the document was a...