Warren G. Lichtenstein, Chairman & CEO of Steel Partners LLC

Warren G. Lichtenstein, Chairman & CEO of Steel Partners LLC

Haruyoshi Yamaguchi/Bloomberg News

Lichtenstein sued Andrew Cader, former head of Goldman Sachs Group Inc.’s Spear, Leeds & Kellogg LP, claiming he helped wrongly inflate child support payments for the mother of Lichtenstein’s 5-year-old daughter.