On Wednesday, Dominique Strauss-Kahn's lawyers asked a French appeals court to dismiss charges in the prostitution case against the former IMF chief, Agence France Presse reported.
Strauss-Kahn has admitted to attending sex parties both in the US and France but he denies knowing there were prostitutes paid to work the parties, AFP wrote.
More from GlobalPost: Dominique Strauss-Kahn, Anne Sinclair separate
Reuters reported the case, which revolves around sex parties and prostitution in the town of Lille, is seeking to determine if Strauss-Kahn "actively promoted prostitution ... and in May broadened their inquiry to include allegations of group rape."
In France, it is not illegal to have sex with prostitutes.
Strauss-Kahn resigned from the International Monetary Fund after his arrest in New York for the alleged sexual assault of a New York hotel housekeeper, although the charges were later dropped.
The court will make a ruling on Nov. 28, AFP reported.
As GlobalPost reported, Strauss-Kahn and his wife Anne Sinclair recently separated. Sinclair now runs the the Huffington Post's French edition.