House Oversight Committee Chairman Rep. James Comer, R-Ky., said interviews around the Epstein files have been "very productive." File Photo by John Angelillo/UPI | License Photo

June 9 (UPI) -- An assistant of Jeffrey Epstein told members of the House Oversight Committee on Tuesday that she was unaware of his crimes but that he was a master manipulator.

Lesley Groff, Epstein's then-executive assistant, told the committee that she believed the massage appointments she made for Epstein with young women and girls were with massage therapists, two sources told CNN. She said Epstein had every reason to keep his crimes secret from her.

Groff helped manage Epstein's life, including making appointments with women, setting meetings with powerful people and arranging Epstein's flights with the young women. She worked for Epstein for nearly 20 years, and her name was listed in the Epstein files more than 150,000 times.

Epstein, a billionaire financier and registered sex offender, died by suicide in prison in 2019.