Casey's backstory is fleshed out over the course of the series. When he was a child, his father's shop was burned down by Hun and the Purple Dragons for being denied protection money. Despite being threatened not to, his father (Arnold Casey Jones Sr.) later went to the police over it. It is implied that he was killed for doing so. This gave Casey his hatred for crime and an essential lifelong vendetta against the Purple Dragons. This backstory was later expanded upon in the Dreamwave comics and adopted into the Mirage series.