Police frisk minor child, were my child's rights violated?

My husband was pulled over for suspicion of speeding and while one police officer had him at the front of the minivan with his back to it the removed my minor child from the vehicle advised him to out his hands up and removed all items from his pockets searched his wallet and questioned him without mine or my husband’s approval. When my husband turned around and realized what was going on he advised my son not to speak to the officer and then the officer advised that he would take my minor child to jail if he did not answer his questions. The cop never gave my husband a ticket for speeding.