A Fond du Lac man arrested on child sex assault and firearms charges was back in court this week. Jeffrey MacMillan entered a not guilty plea to 12 counts of felon in possession of a firearm at an arraignment hearing this week in Fond du Lac County Circuit Court. In addition to the firearms charges MacMillan is also charged with five counts of sexual assault of a child. He was arrested last month after sheriff’s deputies executed a search warrant at his town of Empire home. MacMillan is also accused of repeatedly sexually assaulting a 13 year old girl in the home. McMillan is being held in the Fond du lac County Jail on $2 million cash bond. Fond du Lac judge Gary Sharpe denied a motion to reduce bail.