This unnamed man is the Sheriff of Burkitsville, Indiana.
Dean later visited a Professor to find out something about the Vanir. When Dean tried to leave the Sheriff showed up. The sheriff hit him with his rifle in the face and Dean passed out.
Later he tried with Harley, Stacey and Scotty to sacrifice Dean along with Emily Jorgeson to their god. After Dean and Emily escaped, Harley and his wife were killed by the pagan god, and the Sheriff with Scotty fled.