A man suspected of robbing a Wilton bank in September has been arrested by Norwalk Police for a robbery in the town.  Wilton police say Eliezer Negron of Bridgeport is in custody.  Norwalk police charged the man with robbery for an alleged armed holdup a few days after the Wilton incident.  The man was wearing a hard hat, sunglasses and mask in both incidents.  He handed the tellers a note demanding cash.  While he did not display a weapon, Norwalk Police say he manipulated his backpack as if he was armed.