CFO is better than a trash with no job and nothing to lose

DO not contact with him! Get a lawyer and go to court. He may sue you for hasselment if you continue call/texting or knock door. Lots people here have experience with court and already advised you last time. Once go to court, cut communication with the rat. Let lawyer and court process go as quick as possible. He is CFO, suppose he has some worthable that you may try to collect after when the suit.