Mr Thakur, an Indian Police Service or IPS officer posted in Lucknow, has also demanded "that everything since the day my wife Nutan Thakur filed a case against UP minister Gayatri Prajapati should be probed by the CBI."
Hours after Mr Thakur alleged on Saturday that Mulayam Singh had threatened him in a phone call, a rape case was registered against him by the police on a complaint filed by a Ghaziabad-based woman six months ago. Mr Thakur said the timing of the first information report or FIR registered against him shows it is a case of "political vendetta."
"If the government was serious about the complaint, what was the state government doing all these months," he told NDTV today.
The Samajwadi Party has rejected the policeman's allegations. "The rape complaint against Amitabh was filed on 14th Jan, 2015. It is the duty of an IPS officer to reveal full details when they go public. We waited, inquired and then registered an FIR on alleged rape," said the party's Gaurav Bhatia, adding that the police had taken time to register the case because it wanted to conduct a thorough investigation as it involved a top officer.
Mr Bhatia also denied that Mr Yadav had threatened the policeman on phone. "Mulayam Singh said 'sudhar jaaiye' because he is violating service rules and because his wife is filing numerous petitions against the government. It is not a threat." the SP leader said.
He said Mr Singh had been cordial during the conversation with Mr Thakur, calling him a family member. Mulayam Singh's son Akhilesh Yadav is the chief minister of Uttar Pradesh.
Mr Thakur has filed a complaint against Mulayam Singh and submitted to the police what he say is an audio recording of their conversation on phone.
Election Results for Lok Sabha Election 2019 will be out on May 23. Get the latest election news and live updates on ndtv.com/elections. Catch all the action on NDTV Live. Like us on Facebook or follow us on Twitter and Instagram for news updates from each of the 543 parliamentary seats for the election 2019