Granting the bail, Justice K.Kalyanansundaram of the Court's Madurai bench directed Krishnamurthy to appear before the DSP of CB-CID police in Chennai daily until further orders.
Krishnamurthy was arrested on April 4 in connection with the suicide of senior engineer in the agriculture department S Muthukumaraswamy in Tirunelveli on February 20 last.
This is the third bail application moved by the former minister in the high court after the earlier two were rejected.
He said the call details made from the numbers of the petitioner and the deceased official had been collected and they interrogated several persons working in the department and outside.
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However, the counsel for the petitioner said his client had already spent 60 days in prison. CB-CID had already recorded his statement and they had nothing more to investigate with him.
The death of the official snowballed into a major political row prompting AIADMK to drop Krishnamurthy from the state cabinet and strip him off his party posts before he was arrested.