Officials have identified the man they say killed five co-workers and himself at a Henderson, Kentucky factory early Wednesday.The shooting rampage occurred at the Atlantis Plastics plant, where police say 25 year old Wesley Higdon of Henderson opened fire after an argument with his supervisor.Five people, including Higdon, died at the scene. A sixth victim died later at an Evansville, Indiana hospital. Another person remains hospitalized and is expected to survive.Police say Higdon had been arguing with his supervisor about the use of safety goggles.