(AP)–Two men accused of robbing a Madison fast-food restaurant are facing murder charges after a bystander suffered a fatal heart attack during the incident. The Wisconsin State Journal reports that a criminal complaint released Monday alleges 25-year-old Xavier Fleming and 32-year-old Nicholas Ivy took nearly $4,300 from a Culver’s restaurant in Madison last month. Contractor Christ Kneubuehl of Twin Lakes was in the restaurant with his crew at the time. Crew members told police Kneubuehl agreed to help the men break into the safe to ensure everyone’s safety, but he then suffered a heart attack. Court documents say one suspect refused to call an ambulance and continued to grab money. The Dane County Medical Examiner’s Office says Kneubuehl’s heart attack was caused by stress.