Any evidence obtained in violation of the law in accordance with article 206 of the Code of Criminal Procedure is invalid. Again, Article 22 of the Constitution. In accordance with the Article, confidentiality of communication is essential. Article 20 of the Constitution The article states that private life cannot be touched. However, if the person is certain that the evidence will be lost in the attack directed at him and it will never be possible to prove it again, the evidence he will receive will be binding. In this case, even if the person obtained the evidence of the threat against him illegally during the discussion with the attacker, it will be worth the evidence that he received an audio recording of the sudden incident, since at that moment there is no possibility to contact the competent authorities and the evidence will be lost. You can review the sample Supreme Court Decision.