No person shall be deprived of his life intentionally save in execution of the sentence of a court in respect of a criminal offence of which he has been convicted.
A person shall not be regarded as having been deprived of his life in contravention of subsection (1) if he dies as the result of the use, to such extent and in such circumstances as are permitted by law, of such force as is reasonably justifiable in the circumstances of the case—
for the defence of any person from violence or for the defence of property;
in order to effect a lawful arrest or to prevent the escape of a person lawfully detained;
for the purpose of suppressing a riot, insurrection or mutiny or of dispersing an unlawful gathering; or
in order to prevent the commission by that person of a criminal offence; or if he dies as the result of a lawful act of war.
It shall be sufficient justification for the purposes of subsection (2) in any case to which that subsection applies if it is shown that the force used did not exceed that which might lawfully have been used in the circumstances of that case under the law in force immediately before the appointed day.