In respect of the second factor, which is the question of cause of death and the Appellant’s plea of novus actus interveniens, that is; “a new thing intervening”, it is important to state from the outset that the onus to prove that the accused person caused the death of the deceased is always on the prosecution and that it is not considered sufficient evidence to show that the accused did an act or made an omission which could have caused the death of the deceased. See the cases of R v. SAMUEL ABENGOWE (1936) 3 WACA 85 and R. v. WILLIAM OLEDIMA (1940) 6 WACA 202; UYO v. ATTN-GEN. BENDEL (1986) 1 NWLR (Pt. 17) 418; GABRIEL v. THE STATE (1989) 5 NWLR (Pt. 122) 457. Perhaps, the one thing to always take note of is that the overriding principle with regards to the question of causation in homicide cases is that an accused person is guilty of causing death of the deceased, if the deceased died as a result of the injury he inflicted. What this means in essence, is that where some other act or event intervenes before death, some problems may arise as to whether it was the earlier injury or the subsequent one, or the act or omission of a third party who is not a confederate of the accused or controlled by him, which resulted in the death of the deceased. Where the new act is clearly shown to have occurred, it will normally operate to relieve the accused person of the offence committed as it was recorded in the case of R. v. WILLIAM OLEDIMA (Supra). However, the settled position of the law with regards to the question of causation and which learned Appellants Counsel had sought to latch unto in seeking the release of the Appellant, is that where the chain of causation is considered broken, any resultant death is attributed to the new cause or is considered a contributory factor in causing death. See the English decision in the case of R. v. HUGGINS (1730) 17st. Tr. 309. … In this situation, however, it has often been convenient to distinguish between that which the accused person had caused to happen and that from which he had merely literally offered the occasion. In all such situations, the subsequent act or event, in order to make needed impact, should be capable of independently causing the death of the deceased irrespective of the earlier injury inflicted on the deceased by the accused person. But where the subsequent act is not mortal, it would be utterly wrong to locate criminal responsibility in respect of an offence committed, on someone who should ordinarily be exonerated for acts directly caused by others.
— F.O. Oho, JCA. Nasiru v State (2016) – CA/S/78C/2015