The Red Gnome is a hobgoblin infamous for haunting Detroit as a harbinger of doom.
In the year before the Fort Wayne case, the Ghostbusters were called to Detroit to take care of the Red Gnome once and for all. As alluded to by the Mayor of Detroit, the Ghostbusters were successful but details of the bust are unspecified.
Based on Mythology
According to the legend of Nain Rouge, the Red Gnome was a mythical creature from Normandy, France. Believed to be a type of lutin, or male hobgoblin, the gnome was mostly invisible to human eyes. Dating back to European settlement, the gnome was sighted in present-day Detroit as a small childlike creature with rotten teeth, blazing eyes, and whore red or black fur boots.