New Delhi: Forensic analysis of the CD
allegedly involving former Law Minister Shanti Bhushan, done
by a government laboratory, has said that the conversations in
the audio file examined "could not have been tampered" with as
alleged by civil society activists.
The Central Forensic Sciences Laboratory (CFSL)
located at Lodhi Road conducted the analysis of the CD which
have purported conversations between Bhushan and political
leaders Mulayam Singh Yadav and Amar Singh following Delhi
Police approaching it for examination.
The purported telephone conversation among Shanti
Bhushan, SP chief Mulayam Singh Yadav and Amar Singh suggested
attempts being made at influencing a judge.
"Recorded conversation is in continuity and no abrupt
change in speech signal has been detected," police sources
said quoting from the report prepared by four senior CFSL
scientists, including its Director Rajinder Singh.
In their five-page report, sources said, the
scientists have said that the conversation was "continuous and
without any break and the audio file appeared not to have been
The CD had an audio file of size 2,260 KB and the
duration of the recording was of one minute and 55 seconds.
The report concluded that the recorded conversation is
in "contextual continuity. (There was) no abrupt change in the
phase of speech signal could be detected."
"No change in the background noise pattern throughout
the recording could be observed," the report said.
"Hence the recorded conversation in the CD marked as
exhibit `Q` could not have been tampered. However, complete
examination for authenticity of recorded conversation can be
carried out, if original recording is made available for
examination," the report said.
The CD and its transcript were shown to complainant
Shanti Bhushan, who is co-chairperson of the joint committee
to draft the Lok Pal Bill, and got it countersigned by Bhushan
before it was given to the lab for testing, they said.
Delhi Police spokesperson Rajan Bhagat said
the case has been transferred to the special cell for
Sources said they may call in Bhushan for questioning
in connection with the case. They also said the genuineness of
the CD can be conclusively proved if they can find the
original CD and compare it with the audio files.
However, S R Singh, Director of Truth Labs, which
conducted its tests on behalf of Bhushan, maintained that he
would stand by the report he had given that it was doctored.
The conversation had "multiple gaps and signs of
electronic editing at very very critical places", Singh had
said in his report.