Lakhani appeared before Justice P Velmurugan and gave his evidence in the petition, in which the validity of the left thumb impression (LTI) attestation of late AIADMK general secretary J Jayalalithaa has also been questioned.
Advocate Arunkumar, appearing on behalf of the petitioner, put several questions to Lakhani.
The matter relates to the Thirupparankundram bypoll, in which Bose defeated Saravanan when Jayalalithaa was admitted to the Apollo Hospital here as she was seriously ill.
The judge fixed September 1 as the next date in the matter, when the witnesses will be cross-examined.
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