According to the police, the couple, arrested yesterday from Dombivali in neighbouring Thane district, had threatened to defame the IAS officer, Radheshyam Mopalwar, using recordings of his purported phone conversations.
Satish Mangle, who works as a private detective, and his wife Shraddha had allegedly demanded Rs 7 crore from him for not releasing those tapes and also to retract their allegations of corruption against him, made earlier.
Thane police commissioner Param Bir Singh today said, "Private detective Satish Mangle and his wife Shraddha were arrested by the officials of AEC from Mangle's rented flat in Dombivali yesterday.
"Police recovered two laptops, five mobile phones, four pen drives, 15 CDs and some incriminating documents from the flat," Singh added.
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The couple and their friend, Anil Vedmehta, contacted Mopalwar through one Kling Mishra and asked him to meet them at Kharegaon toll plaza on Nashik Highway last month, Singh told reporters.
Earlier, Mangle had twice threatened Mopalwar, seeking money claiming that he had contacts in the Arun Gawli gang and some other organised crime syndicates, and was blackmailing him, he said.
Mopalwar video-recorded his half-an-hour long conversation with Mangle at a five-star hotel in Mumbai on October 31 using spy-cams, during which the accused threatened and demanded money, the police commissioner said.
Mopalwar then approached the AEC of Thane police and lodged a complaint.
"We are looking for their two accomplices," he added.
In the past, Mopalwar had sought Mangle's help, as a private detective, in his divorce-related issues.
While working on the case, Mangle allegedly made recordings of some private conversations, and later he demanded money from Mopalwar, blackmailing him.
Mangle also provided some of these incriminating audio clips to news channels, which were aired.
Mangle, who has studied upto Std 10th, networked with senior government officials and recorded their private conversations whenever he got opportunity, a police official said.
He was in trouble in 2012 when a case under the Information Technology Act was registered against him at Bandra police station in Mumbai, the official said. Mangle is also facing a case of extortion and another case of rape at Mira Road police station, he added.
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