First, the lawyer does this to get the case entrusted and goes to the meeting without permission. He suggested that the family members communicate with a lawyer to ask him to stop such illegal behavior. If necessary, he can notify his law firm.
Second, the lawyer does this to collect evidence for other suspects or to deliver any news that may harm the interests of the suspect. It is recommended that his family members immediately complain to their law firm and bar association.
It is best to leave the above solutions to the defense lawyers entrusted by the families to properly handle them.