India, Nov. 3 -- The National Forensic Science Laboratory (NFSL), Gandhinagar, informed the Supreme Court that someone tampered with the audio recordings allegedly implicating former Manipur Chief Minister N. Biren Singh in the 2023 ethnic violence, making them scientifically unfit for voice comparison.

Consequently, the laboratory said it cannot provide any opinion on the similarity or dissimilarity of the voices in question.

The finding emerged during the hearing of a petition seeking a court-monitored investigation into the recordings, which purportedly relate to the ethnic unrest in Manipur last year.

A Bench comprising Justice Sanjay Kumar and Justice Alok Aradhe examined the matter on Monday.

After reviewing the sealed NFSL repo...