; and (B) one qualified expert in pediatric medicine. (2) Medical assessments On obtaining custody of a child, the Commissioner shall ensure that the child undergoes a medical assessment carried out by, or in consultation with, the expert in pediatric medicine at the applicable port of entry or Border Patrol Station, in accordance with the guidelines developed under subsection (a). (3) Interpreter required In the case of a child welfare professional or an expert in pediatric medicine at a port of entry or Border Patrol station who does not speak the language of a child in custody at such port of entry or station, the Secretary shall provide an interpreter. (4) Duties A child welfare professional described in paragraph (1)(A) shall— (A) ensure that— (i) any allegation of abuse or mistreatment of a child in the custody of the Commissioner is referred to the appropriate Federal and State authorities; (ii) any investigation of an allegation described in clause (i)— (I) receives support from the child welfare professional, who shall follow up on the referral under that clause and coordinate with the investigation until the completion of the investigation; and (II) is conducted by a multidisciplinary team that uses a trauma-informed approach to investigation, such as Children's Advocacy Centers, to the maximum extent practicable; and (iii) the Commissioner and the Director of the Office of Refugee Resettlement comply with applicable child abuse reporting laws, including by— (I) ensuring that children in such custody have access to applicable complaint mechanisms to report abuse or misconduct; (II) reporting any allegation of abuse or mistreatment to— (aa) the applicable Federal and State authorities; (bb) the Office of Inspector General of the Department; (cc) the Office for Civil Rights and Civil Liberties of the Department; (dd) the Internal Affairs Office of U.S. Customs and Border Protection; and (ee) the Office of Refugee Resettlement