Wikisimpsons - The Simpsons Wiki
Jericho and Herman Hermann were illegally selling counterfeit jeans out of the Simpsons' garage. They chose the location because Marge Simpson was a Springfield Police officer at the time, and they figured that a cop's garage was the last place anyone would suspect. However, Jericho, his two guards and Herman were all later caught and arrested by Officer Marge. Jericho has not been heard from since.
Jericho wears a large fishing hat that covers so much of his head that it's unknown what color his hair is, or even whether he has any. He also wears sunglasses and a dark blue shirt of the same style that Grampa wears. Jericho is also almost always seen smoking a cigarette and accompanied by two guards.