; (3) the child is a danger to himself, herself, or others, as determined by a State court or an official from a State or county child welfare agency in his or her official and undelegated capacity; or (4) there is a strong likelihood that the adult is not the apprehended parent or legal guardian of the child. 4. DNA testing (a) Use of other techniques Before utilizing DNA testing to determine family relationships, agencies shall use other techniques commonly utilized by United States courts for determining family relationships, including official documents, representations from a witness, parent, relative, or child, and observations of interactions between the adult and the child. (b) DNA testing (1) In general DNA testing may not be required as a condition of reunification if alternative means of demonstrating a familial relationship have been established. If reasonable suspicions remain about a familial relationship after exhausting the techniques referred to in subsection (a), DNA testing may be used. (2) Protocols The agencies shall develop protocols for establishing a familial relationship if an individual does not want to consent to DNA testing or may not have a biological relationship with a child. (3) Type of test Whenever DNA testing is used, the agencies shall use the least privacy-invasive type of DNA test available to confirm the claimed relationship and may not charge the child or apprehended parent or guardian for the costs of conducting such testing. (4) Consent The agencies shall— (A) obtain the consent of any individual older than 18 years of age before conducting a DNA test; (B) make every effort to obtain the consent of a guardian before conducting a DNA test on anyone younger than 18 years of age