The NY Sun reported this morning before the NYT bombshell that the prostitution ring case is being handled by the Justice Department's public corruption section:

Prosecutors specializing in government corruption cases are leading the investigation into what authorities say was a prostitution service that charged up to $5,500 an hour — suggesting that the U.S. attorney's office in Manhattan may have evidence that a public official hired a prostitute. …

During a court hearing in the case, at which the four people were arraigned, it emerged that all three of the assistant U.S. attorneys assigned to the prosecution are part of the U.S. attorney's public corruption unit. One is the bureau's chief, Boyd Johnson III. The unit investigates wrongdoing by both elected and nonelected officials and bureaucrats at various levels of government. …

"When we first got the case, we were surprised that these were the assistants handling the case," said a defense attorney, David Gordon, who represents one of two women alleged to have booked engagements for prostitutes.