A senior Delhi police official said the controversial CD containing purported conversation between eminent lawyer Shanti Bhushan and political leaders Mulayam Singh Yadav and Amar Singh was referred to Central Forensic Sciences Laboratory (CFSL) for testing. CFSL gave the report saying the CD does not seem to have been tampered with and there is continuity in the conversation. "Recorded conversation is in continuity, no abrupt change in speech signal has been detected," says the report.

Delhi Police had on Monday given the CD to the laboratory for forensic analysis after Bhushan provided them with a copy of it. Police had earlier registered a case under Section 469 (forgery intended to cause disreputation) against unknown persons on a complaint filed by Bhushan, who alleged that the CD was forged and intended to malign his reputation and derail the process of joint drafting committee on Lokpal Bill. The CD and its transcript were shown to complainant Shanthi Bhushan, who is co-chairperson of the joint committee to draft the Lok Pal Bill, before it was given to the lab for testing.