The 55-year-old Marinette County man facing homicide charges pled not guilty in Marinette County Court Tuesday.
Police arrested Richard Heyer last month for the murder of his ex-girlfriend, 51-year-old Ann Schueller, at a gas station in Wausaukee. Heyer pled not guilty by reason of mental disease or defect. The court ordered him to undergo a mental examination and scheduled a status conference for November 13. Heyer, who is from Crivitz, is charged with first degree intentional homicide with a dangerous weapon and possession of a firearm by a felon.