A judge in New York is expected to dismiss sexual assault charges against former International Monetary Fund chief Dominique Strauss-Kahn Tuesday, after prosecutors moved to have them dropped.

Strauss-Kahn was arrested in May on suspicion of raping a hotel maid in New York City. On Monday, prosecutors said the evidence did not prove that he engaged in a forced sexual encounter with the woman. They also expressed concern about the accuser's reliability, saying she has not been truthful on “great and small” matters.

Guinean-born maid Nafissatou Diallo accuses the former IMF chief of sexually assaulting her when she went to clean his room at a Manhattan hotel on May 14. Strauss-Kahn's lawyers deny the allegation and suggest that any sexual encounter was consensual.

Strauss-Kahn is due in court Tuesday, when the judge will consider the Manhattan District Attorney's request for dismissal.

Diallo's case faltered in late June when prosecutors revealed inconsistencies in her account of what happened. They also disclosed that she had fabricated a story about being gang-raped in her native Guinea for her U.S. asylum application.

Even if the criminal charges are dropped, efforts to clarify what happened between Strauss-Kahn and Diallo will likely continue in civil court, where she has sued him.

Before the incident, Strauss-Kahn was a leading contender to challenge French President Nicolas Sarkozy in an election next year. He resigned his IMF post after being arrested on the rape allegations, which significantly eroded his support among French voters.

He has been free on bail since a brief period of detention after his arrest.