Mumbai Police, who are conducting inquiry in complaints of alleged extortion attempt by NCB officials in the drug seizure case involving Aryan Khan, summoned the central agency's independent witness Prabhakar Sail again on Thursday.
Police had recorded Mr Sail's statement twice over the last two days.
On Thursday he appeared before the police team conducting the inquiry around 2.30 pm.
He was then taken to some locations mentioned in his affidavit about the alleged extortion attempt, and the police are also collecting CCTV footage from some places, said an official.
Mr Sail's lawyer Tushar Khandare, meanwhile, told reporters that the Narcotics Control Bureau should take its zonal director Sameer Wankhede off the cruise ship drugs seizure case as he was facing allegations.
The Mumbai police had earlier said they had received four applications alleging extortion bid by Mr Wankhede and other NCB officials, and launched an enquiry to verify them.
One of the applications was sent by Mr Sail, who alleged that he overheard KP Gosavi, another witness in the cruise ship raid case, talking to "Sam D'Souza" over the phone about a demand of Rs 25 crore including Rs 8 crore for Sameer Wankhede.
Mr Wankhede, an IRS officer, has denied the allegations.
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