In 2011, he represented Nafissatou Diallo, the hotel housekeeper who claimed that she was sexually assaulted in a Manhattan hotel room by Dominique Strauss-Kahn, the former head of the International Monetary Fund. Though government prosecutors dropped the criminal suit against Strauss-Kahn, stating they were not convinced of his culpability beyond a reasonable doubt due to what they described as serious issues in Diallo's credibility and inconclusive physical evidence, Thompson refused to let the case go; he filed motions to have the district attorney's office disqualified, and when the motion was denied he appealed that decision, only to have his appeal denied. After the criminal case was dismissed, Thompson brought a civil suit against Strauss-Kahn and a civil suit against the "New York Post" on Diallo's behalf; in December 2012 the civil suits settled with confidential terms.