Jo-Jo was a terran who lived in the Gutter, working for the crime lord Fagin. He and co-worker Francee do not get along, to the point that Jo-Jo refuses to visit her, even for work purposes.
In 2500, Jo-Jo brought a wrangler into Fagin's HQ as per the investigator's request. Fagin fired his P220 in response, Jo-Jo being killed by the gunfire.
DeCandido, Keith R. A. (November 28, 2006). StarCraft: Ghost: Nova. Simon & Schuster (Pocket Star). ISBN 0-7434-7134-2