A Minnesota man is facing a second-degree murder charge after he is accused of bludgeoning his coworker with a sledgehammer at a business in Cokato on Tuesday. David Delong, a 40-year-old employee at Advanced Process Technologies, is accused of killing 20-year-old co-worker Amber Czech of Hutchinson. The incident reportedly occurred early Tuesday morning, with surveillance video capturing Delong putting on gloves and using a sledgehammer from the woman's workstation to attack her. | Fox 9