Jeffrey Taylor, U.S. Attorney for the District of Columbia, address the media about the anthrax investigation, Aug. 6, 2008. (AP Photo/Lawrence Jackson) Last Wednesday, U.S. Attorney Jeffrey Taylor said of Bruce Ivins, the biodefense researcher who committed suicide as prosecutors prepared to indict him in connection with the 2001 anthrax attacks: "We believe we could have proven Dr. Ivins's guilt beyond a reasonable doubt. We regret that we will not have the opportunity to present evidence to the jury."

Two days later,...