When Arnold was a wild young kid he got his first tattoo and formed the Purple Dragons gang. Life was good for Hun until he met a young woman, got married, and settled down. He quit his more outwardly violent gang lifestyle, but when his wife got sick, Arnold fell into alcoholism, becoming abusive toward his son, Casey Jones, after the passing of his wife. Once he'd seen Casey in the hospital following Shredder's assault on him, and overheard Angel saying some disparaging things about him, Arnold tore off his shirt and punched a mirror in the hospital bathroom, vowing to never drink again.