The agency has used the services of forensic experts from AIIMS to detect if Batcha was killed but even after detailed examination, sleuths have not found anything which can substantiate the murder hypothesis, CBI sources said. The CBI has, for cross-checking, roped in a team of doctors from AIIMS to examine the viscera and post mortem details of Batcha to rule out any "foul play" in his death.
Batcha had left a suicide note in which he had stated that he was "embarrassed" by the raids of various enforcement agencies and the extensive media coverage of them. The agency had also examined the suicide note and came to conclusion that it was in his own handwriting. Also, there were no signs that he was forced to write it, according to a forensic report. The CBI had handed over the suicide note to General Examiner of Questioned Documents which opined that the suicide note was in Batcha`s handwriting and it was not forced, official sources said.
38-year-old Batcha, who was MD of Greenhouse Promoters, a firm under scanner of CBI and Enforcement Directorate in connection with the 2G scam was questioned in great detail by the CBI on the role of the former telecom minister and other DMK leaders in connection with the spectrum case.