Younger brother Marc-Olivier Strauss-Kahn, director at Banque de France, was dressed in slacks and a short-sleeved button-down shirt during the visit, The New York Post reported.
He was accompanied by a woman who appeared to be in her 50s.
However, Marc-Oliver declined to comment.
Strauss-Kahn, 62, allegedly forced the 32-year-old maid at the Sofitel hotel to perform oral sex.
He was taken into custody a few minutes before his Air France flight departed for Paris on May 15.
The Post reported that Strauss-Kahn's defense team employed Guidepost Solutions, a private investigations firm run by ex-federal prosecutors, to cross-check every statement in his accuser's allegation.
The former IMF chief now has to wear an electronic monitoring device.
He has also posted USD 1 million in bail and USD 5 million bond to stay out of jail and will next appear in court on June 6.
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