JUST IN: Leon Black filed a lawsuit against the House Oversight Committee and Chairman James Comer before failing to appear under subpoena for a deposition before the panel as part of its probe into the government's investigation of Jeffrey Epstein. ↧ Billionaire Leon Black sues House Oversight Committee over subpoena... Billionaire Leon Black filed a lawsuit against the House Oversight Committee before failing to appear under subpoena for a deposition in the panel's Epstein probe.