Is it necessary, in order to prove a claim under 42 U.S.C. § 1983 for violation of the Fourteenth Amendment concerning a parent's liberty interest in the care, custody, control, and management of her child, for the plaintiff to prove that she lost custody of that child?

More specifically:

Do government authorities violate a parent's Fourteenth Amendment liberty interest in the care, custody, control, and management of their children when they seize and interview a child at school in violation of the child's Fourth Amendment rights?

Is a parent's Fourteenth Amendment liberty interest in the care, custody, control, and management of their child violated when government authorities seize and interview the child at school in violation of the child's Fourth Amendment rights?