Any person who‐
(a) rescues any person during his conveyance as an insane person to a hospital, lunatic asylum, or a reception house for the insane or to a house licensed under the laws relating to insane persons for the reception of patients, or to a prison, rescues any person during his confinement as an insane person in any such place; or
(b) being in charge of a person during his conveyance as an insane person to any such place, wilfully permits him to escape from custody; or
(c) being a superintendent of, or person employed in any such place, wilfully permits a person confined therein as an insane person to escape therefrom; or
(d) conceals any such person as aforesaid, who has, to his knowledge, been rescued during such conveyance or confinement, or has, to his knowledge, escaped during such conveyance, or from such confinement,
is guilty of a felony and is liable to imprisonment for three years. The offender cannot be arrested without warrant.
Section 143 of the Criminal Code Act in Nigeria