The man accused of firing off seventy rounds of ammunition in downtown Bangor on the 4th of July pleaded not guilty in federal court this morning. 43-year-old Perrin Oliver is charged with being a felon in possession of a firearm. According to court documents, Oliver was not allowed to have guns due to a conviction in 2008 in New York. Police say he fired shots out a window of his park street apartment July 4th. Oliver has also been charged in state court with criminal threatening and reckless conduct with a firearm. Oliver is still in federal custody.