Giancarlo Zambrano, 35, showed up in court on a charge he bilked a Child Street homeowner out of $7,000. That's bad enough for the JP woman he allegedly took the money from for vinyl siding work he never did. But the case is drawing wide attention because the defendant happens to be the twin brother of Jorge Zambrano, who killed an Auburn police officer before himself dying in a shootout with law enforcement. Giancarlo Zambrano initially did not show up Thursday for a summons to West Roxbury Municipal Court, according to the Suffolk County District Attorney's Office. However, he did eventually come to court, where he paid $4,000 toward restitution in the case.