An accountant for late convicted sex offender Jeffrey Epstein will testify Wednesday before the House Oversight and Government Reform Committee in a closed-door deposition.

Richard Kahn was Epstein's accountant for more than 10 years and became an executor of his estate after his death, CBS News reported. Kahn was one of Epstein's closest associates in his final years, as he managed the financier's investments, finances and other matters, such as renovations on his private island.

Another executor of Epstein's estate, lawyer Darren Indyke, is expected to testify before the committee on March 19.

According to documents from lawsuits and the Justice Department's Epstein files, Epstein, Kahn, and Indyke together operated a sophisticated and tangled web of businesses.

The release of the files has shed more light on Epstein's association with some of the world's most powerful men, some of whom continued to associate with him after he pleaded guilty in 2008 to soliciting a minor for prostitution.

After the House committee issued subpoenas to Kahn and Indyke in January, Daniel H. Weiner, an attorney for both men, said that allegations against them are "false." 

"It is worth emphasizing that not a single woman has ever accused either Mr. Indyke or Mr. Kahn of committing sexual abuse or witnessing sexual abuse, nor claimed at any time that she reported to them any allegation of Mr. Epstein's abuse," Weiner said.

"Indyke and Kahn did not socialize with Mr. Epstein, and they have always rejected as categorically false any suggestion that they knowingly facilitated or assisted Mr. Epstein in his sexual abuse or trafficking of women, or that they were aware of Mr. Epstein's actions while they provided legal and accounting services to Mr. Epstein." 

Both Kahn and Indyke recently settled a lawsuit alleging they facilitated sham marriages for immigration purposes in which foreign-born victims married U.S. citizens whom Epstein abused.