Can attempts to keep a parent from a child held by police invalidate the child's confession?
Yes. However, there is no police-made invalidation where the police do not attempt to conceal the child or deceive the family, even if a parent refuses permission to see the child.
A parent or legal guardian of a child may invoke the right to counsel on the child's behalf. However, in order for the right to attach, the invocation of counsel must be unequivocal.