A Muscatine man pled not guilty to two counts of 3rd degree sexual assault on Friday in Marion County District Court. 19-year-old Robert Bingham is accused of twice sexually assaulting a girl between October of 2008 and February of 2009. The girl was under the age of 14 at the time of the alleged incidents. Bingham previously lived in the Melcher-Dallas area, and a warrant was served for his arrest last month. He’ll be in court again in September for a pre-trial conference.