Former Statesboro City Councilman Gary Lewis, indicted in December on a charge of extortion, admitted guilt Thursday under a plea agreement with the government, said Assistant U.S. Attorney R. Brian Tanner, who handled the case in federal court in Statesboro. If the court accepts the recommendation, Lewis could face up to 15 months in federal prison, he said. However, according to court documents regarding the case, the court may accept or reject the agreement.