In 1973, Berkshire began to acquire stock in the Washington Post Company. Buffett became close friends with Katharine Graham, who controlled the company and its flagship newspaper, and joined its board. In 1974, the SEC opened a formal investigation into Buffett and Berkshire's acquisition of Wesco Financial, due to possible conflict of interest. No charges were brought. In 1977, Berkshire indirectly purchased the Buffalo Evening News for $32.5 million. Antitrust charges started, instigated by its rival, the Buffalo Courier-Express. Both papers lost money, until the Courier-Express folded in 1982.