Jonathan Stempel 3 minute read Leon Black is pictured here in Beverly Hills, California, U.S. May 1, 2018. REUTERS/Lucy Nicholson Leon Black, the billionaire who until recently had led private equity firm Apollo Global Management Inc (APO.N) for more than three decades, was sued on Tuesday by a woman who accused him of defamation and subjecting her to sexual violence. Guzel Ganieva said Black lied by denying her March 17 accusations on Twitter that he had "sexually harassed and abused" her "for years," when he told news media in April he had "foolishly had a consensual affair" with her and th...