Microsoft co-founder Bill Gates is among seven people who on Tuesday were asked to testify before the House Oversight and Government Reform Committee regarding its ongoing investigation into convicted sex offender Jeffrey Epstein . The six others are Lesley Groff, a former longtime executive assistant to Epstein; Sarah Kellen, another former Epstein employee; Kathryn Ruemmler , former White House counsel to former President Barack Obama; Leon Black , co-founder of Apollo Global Management; Doug