An Examination Of The Plea Of Insanity Under The Nigerian Criminal Jurisprudence -By Oyetola Muyiwa Atoyebi & Victor Atang – Opinion Nigeria
A person is not criminally responsible for an act or omission if, at the time of doing the act or making the omission, he is in such a state of mental disease or natural mental infirmity as to deprive him of capacity to understand what he is doing, or of capacity to control his actions, or of capacity to know that he ought not to do the act or make the omission.
Source: opinionnigeria.com