Can I call the police for my ex's suspended driving license?
Yes, you can call the police. But the matter will ultimately be decided in family court, not by the police. Police can fine your ex for not having a valid license, but they can't stop their visitation right due to a suspended driving license. So, you should not call the police for a temporary solution. Instead, you can talk to a lawyer for a permanent solution with the court's help by modifying the custody order.