The four corporators - Vikrant Chavan (Congress), Najib Mulla, Hanumant Jagdale (both NCP) and Sudhakar Chavan (independent) walked into the office of Investigating Officer ACP Dileep R Gore of the Vartak Nagar division and surrendered themselves around 9 AM.
On December 1, the corporators had sought time to surrender before police and had withdrawn their bail petitions after being denied relief by Justice Ajey Gadkari.
The four corporators had approached the High Court in November seeking pre-arrest bail after a sessions court in Thane rejected their plea for the same.
The High Court had on November 3 granted the four interim protection from arrest and posted their petitions for final hearing.
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Parmar, a leading builder, had shot himself on October 7. His suicide note alleged that a nexus of corporators and officials was harassing him for bribes.
Thane Police had registered a case of abetment of suicide under the IPC and 'criminal misconduct' under the Prevention of Corruption Act as the suicide note allegedly named these four corporators.
Meanwhile, police has found one more vital document related to income tax raids in 2014 on COSMOS group of builders headed by Parmar.
The document contains names of some of the beneficiaries
in full, some nick names and some initials as well, adding upto eight persons.
The police is now trying to decipher the information in the document and hopes that some more political skeletons may tumble out as the custodial interrogation progresses.
Thakare also told the court that one of the accused had transferred over Rs one crore to the account of an NCP MLA and all this needs to be thoroughly probed.