Probing advocacy from DKS’s lawyer, who is accused of attending orgy parties.

A lawyer for Mr. Strauss-Kahn appeared to confirm that he had attended the events, saying that his client would not have been aware if the women who entertained him were prostitutes.

“He could easily not have known, because as you can imagine, at these kinds of parties you’re not always dressed, and I challenge you to distinguish a naked prostitute from any other naked woman,” the lawyer, Henri Leclerc, told a French radio station, Europe 1, in December.

While prostitution is legal in France, the investigating magistrates are trying to determine whether the women were paid with funds one of the men might have embezzled. The magistrates seek to discover whether Mr. Strauss-Kahn might have known of any such payments.