The Silicon Valley venture capitalist William Elkus once was a trustee for one of Jeffrey Epstein's foundations in the 1990s, according to documents reviewed by Business Insider. Elkus and Epstein each managed money for wealthy families in the late 1980s and '90s. Elkus went on to found Clearstone Venture Partners in 1998, which invested in PayPal, eToys, and United Online. Epstein did not invest with or advise Clearstone, the company's chief financial officer said. Nearly 30 other Silicon Valley firms previously told Business Insider that the now deceased sex offender was not a direct investor.