Mo. Rev. Stat. § 221.044
No person under the age of eighteen years, except those transferred to the court of general jurisdiction under the provisions of section 211.071, shall be detained in a jail or other adult detention facility as that term is defined in section 211.151. If a person is eighteen years of age or older or attains the age of eighteen while in detention, upon a motion filed by the juvenile officer, the court may order that the person be detained in a jail or other adult detention facility as that term is defined in section 211.151 until the disposition of that person's juvenile court case.
(L. 1989 H.B. 502, et al., A.L. 2018 S.B. 793 merged with S.B. 800, A.L. 2025 S.B. 43)
CROSS REFERENCE:
Status as child for confinement in jail determined by then-existing law at time of alleged offense, 211.012