Where several persons are engaged or concerned in the commission of a criminal act, they may be guilty of different offences by means of that act.

Illustration

A attacks Z under such circumstances of grave provocation that his killing of Z would be only culpable homicide not amounting to murder. B, having ill-will towards Z and intending to kill him, and not having been subject to the provocation, assists A in killing Z. Here, though A and B are both engaged in causing Z’s death, B is guilty of murder, and A is guilty only of culpable homicide.

When an offence is committed by means of several acts, whoever intentionally co-operates in the commission of that offence by doing any one of those acts, either singly or jointly with any other person commits that offence.

Illustrations

(a) A and B agree to murder Z by severally and at different times giving him small doses of poison. A and B administer the poison according to the agreement with intent to murder Z. Z dies from the effects of the several doses of poison so administered to him. Here A and B intentionally co-operates in the commission of murder and as each of them does an act by which the death is caused, they are both guilty of the offence though their acts are separate.

(b) A and B are joint jailors, and as such have the charge of Z, a prisoner, alternately for six hours at a time. A and B, intending to cause Z’s death, knowingly co-operate in causing that effect by illegally omitting, each during the time of his attendance, to furnish Z with food supplied to them for that purpose. Z dies of hunger. Both A and B are guilty of the murder of Z.

(c) A, a jailor, has the charge of Z, a prisoner. A, intending to cause Z’s death illegally omits to supply Z with food in consequence of which Z is much reduced in strength, but the starvation is not sufficient to cause his death. A is dismissed from his office, and B succeeds him. B, without collusion or co-operation with A, illegally omits to supply Z with food, knowing that he is likely thereby to cause Z’s death. Z dies of hunger. B is guilty of murder, but, as A did not co-operate with B. A is guilty only of an attempt to commit murder.

Wherever the causing of a certain effect, or an attempt to cause that effect, by an act or by an omission, is an offence, it is to be understood that the causing of that effect partly by an act and partly by an omission is the same offence.

Whenever an act, which is criminal only be reason of its being done with a criminal knowledge or intention, is done by several persons, each of such persons who joins in the act with such knowledge or intention is liable for the act in the same manner as if the act were done by him alone with that knowledge or intention.

34. Acts done by several persons in furtherance of common intention.- When a criminal act is done by several persons in furtherance of the common intention of all, each of such persons is liable for that act in the same manner as if it were done by him alone.