Chad Isaak, 47, is charged with four counts of murder as well as lesser counts. He faces life in prison if convicted. The incident was one of the most gruesome mass killings in North Dakota history. Four workers at a business who gathered early one morning for 'coffee club' were slain in a matter of minutes. Three were shot and stabbed. The alleged killer shot nine times and flailed away with a knife, cutting one victim's throat. Killed in the attack were RJR Maintenance and Management co-owner Robert Fakler, 52, and co-workers Adam Fuehrer, 42, and spouses Bill and Lois Cobb, aged 50 and 45. Investigators say the evidence against Isaak is overwhelming, including clothing, handgun parts, a knife and used shell casings, surveillance footage, bank records, and Facebook and phone data.