Facts which are the occasion, cause or effect, immediate or otherwise, of relevant facts, or facts in issue, or which constitute the state of things under which they happened, or which afforded an opportunity for their occurrence or transaction, are relevant.
Illustrations
(a) The question is, whether A robbed B. The facts that, shortly before the robbery, B went to a fair with money in his possession, and that he showed it, or mentioned the fact that he had it, to third persons, are relevant.
(b) The question is, whether A murdered B. Marks on the ground, produced by a struggle at or near the place where the murder was committed, are relevant facts.
(c) The question is, whether A poisoned B. The state of B's health before the symptoms ascribed to poison, and habits of B, known to A, which afforded an opportunity for the administration of poison, are relevant facts.
Legal Commentary & Landmark Judgments: Section 5
Section 5 establishes the relevancy of causal and circumstantial facts, rendering admissible any fact that constitutes the occasion, cause, effect, state of things, or opportunity surrounding a fact in issue.
Practitioners must remember that while proof of 'opportunity' under Section 5 is essential in homicide and circumstantial cases, mere opportunity without independent corroboration can never sustain a conviction. Establishing that an accused was 'last seen' in the company of the deceased creates a relevant opportunity under Section 5, which may then activate an explanatory burden under Section 106 of the BSA.