Photo by Samer Farha Federal authorities believe former D.C. Taxicab Commission chairman Causton Toney participated in a long-running bribery scheme while he held that position from 2005-2007, the Washington Post reports this morning. A recently unsealed affidavit lays out the FBI’s suspicions against Toney, who has not been charged with any crime, but whose home was raided in October. The links between Toney and the bribery allegations stem from the same D.C. taxicab industry…