Custody of children and young persons not discharged on bail after arrest

Where a person apparently under the age of eighteen years has been apprehended and is not released as provided in section 4 of this Act, the senior member of the police department present shall cause him to be detained in a place of detention provided under this Act until he can be brought before a court unless after the officer certifies, (a) that it is impracticable to do so; or (b) that he is of so unruly or depraved a character that he cannot be safely so detained; or (c) that by reason of his state of health or of his mental or bodily condition it is inadvisable so to detain him, and the certificate shall be produced to the court before which the person is brought