Aghnoo Nagesia v. State of Bihar AIR 1966 SC 119

Now, a confession may consist of several parts and may reveal not only the actual commission of the crime but also the motive, the preparation, the opportunity, the provocation, the weapons used, the intention, the concealment of the weapon and the subsequent conduct of the accused. If the confession is tainted, the taint attaches to each part of it. It is not permissible in law to separate one part and to admit it in evidence as a non-confessional statement. Each part discloses some incriminating fact, i.e., some fact which by itself or along with other admitted or proved facts suggests the inference that the accused committed the crime, and though each part taken singly may not amount to a confession, each of them being part of a confessional statement partakes of the character of a confession. If a statement contains an admission of an offence, not only that admission but also, every other admission of an incriminating fact contained in the statement is part of the confession. 14. If proof of the confession is excluded by any provision of law such as S. 24, S. 25 and S. 26 of the Evidence Act, the entire confessional statement in all its parts including the admissions of minor incriminating facts must also be excluded, unless proof of it is permitted by some other section such as S. 27 of the Evidence Act. Little substance and content would be left in Ss. 24, 25 and 26 if proof of admissions of incriminating facts in a confessional statement is permitted.