REPUBLIC v. APPIAH Criminal law and procedure—Extortion—Proof—A, special prosecutor, a public officer—A in position to influence decision of tribunal—No evidence of representation by A that he was member of tribunal—Evidence that A aiding in writing of ruling on petition of O—A obtaining moneys from D and O when their petitions before tribunal—Whether A guilty of extortion—Criminal Code, 1960 (Act 29), ss. 239 (1) and 247.