House lawmakers are set to question billionaire investor Leon Black as part of their investigation into Jeffrey Epstein and the powerful people around him. Black was formerly the chief executive of Apollo Global Management and paid Epstein $158 million from 2012 to 2017 for tax and estate planning services. That's according to a 2021 review commissioned by Apollo. Black stepped down from Apollo in 2021 amid fallout over his ties to Epstein. With his closed-door deposition on Friday morning, Black will become the latest high-profile figure to appear before the House Oversight Committee.