Mishra arrived at the ACB office at noon to record his statement and his examination is currently underway.
A few days back, he had visited the ACB office and shared evidence related to the tanker scam that dates back to Sheila Dikshit's tenure as chief minister.
Mishra has alleged that the investigation into the tanker scam was repeatedly delayed and influenced by Kejriwal and "his two men".
Last year in August, Dikshit was examined by the ACB officials in connection with her alleged involvement in the tanker scam and was also handed over a set of 18 written questions.
The Kejriwal-led AAP government had in June 2015 constituted a fact-finding committee to go into alleged irregularities in procuring some 385 stainless steel water tankers by the DJB.
The Delhi government in June 2016 sent a report of the fact-finding committee to the then Lieutenant Governor Najeeb Jung following which an FIR was registered in case.
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