The Oracle of Graft?

``One of Warren Buffett's favored lieutenants, who was seen as his leading heir apparent, resigned after buying shares in a company he later recommended that Buffett acquire. David Sokol's resignation from his roles as chairman of Berkshire Hathaway units MidAmerican Energy and NetJets raised questions about the transparency of his dealings with Buffett -- namely whether he concealed the size of share purchases in Lubrizol Corp. The resignation could be a reputational blow for Buffett, the 80-year-old "Oracle of Omaha," who recently sealed a $9 billion deal for Lubrizol Corp at Sokol's urging... Buffett said on Wednesday that he did not feel Sokol's purchases were unlawful.''