“26. A witness is normally to be considered independent unless he or she springs from sources which are likely to be tainted and that usually means unless the witness has cause, such as enmity against the accused, to wish to implicate him falsely. Ordinarily, a close relative would be the last to screen the real culprit and falsely implicate an innocent person. It is true, when feelings run high and there is personal cause for enemity, that there is a tendency to drag in an innocent person against whom a witness has a grudge along with the guilty, but foundation must be laid for such a criticism and the mere fact of relationship far from being a foundation is often a sure guarantee of truth. However, we are not attempting any sweeping generalisation. Each case must be judged on its own facts. Our observations are only made to combat what is so often put forward in cases before us as a general rule of prudence. There is no such general rule. Each case must be limited to and be governed by its own facts.”
Supreme Court
Dalip Singh v. State of Punjab, 1954 SCR 145: AIR 1953 SC 364: 1953 Cri LJ 1465