Opposition parties in Uttar Pradesh alleged on Wednesday that senior police officer DD Mishra's house arrest was an attempt by the state government to gag him.
Last week, the DIG in the state fire service had stirred up controversy when he levelled corruption charges against his senior officials.
An inquiry was ordered into the allegations. Meanwhile, Mishra, 58, was forcibly admitted to a hospital, where he was declared mentally unstable.
Mishra was discharged on Tuesday. SN Sankhwar, chief medical superintendent of the Chhatrapati Sahuji Maharaj Medical University said, "Mishra was discharged after his condition stabilised. He has been given medicines for a week after which he has been asked to come for another check-up."
"Ever since he has been discharged from hospital, Mishra and his family members are not being allowed to talk to mediapersons," Samajwadi Party spokesperson Rajendra Chaudhary told reporters.
The Mayawati government, he said, feared the officer could expose large-scale financial anomalies in its functioning.
When HT tried to contact Mishra at his Gomti Nagar residence, guards said they had strict orders not to allow mediapersons on the campus.
"We believe the officer knows certain secrets that could spell trouble for the government," said Congress spokesperson Akhilesh Pratap Singh.
BJP spokesperson Vijay Bahadur Pathak concurred. He said, "The government will make every effort to prove Mishra's allegations wrong. It fears he could provide documents to mediapersons to corroborate his allegations."
According to sources, Mishra called up two police officials — including, Lucknow DIG DK Thakur — on Friday, and apologised for his bad behaviour.
Meanwhile, director general of anti-corruption organisation, Atul has started probing the corruption charges against senior officials of fire services in the R1.47 crore purchase of 13 new water tenders, on Tuesday. He also met Mishra on the issue.
Mishra had made accusations not only against top state officials but also against Mayawati, whom he blamed for the death of a senior IAS officer Harminder Raj Singh, who was officially stated to have shot himself in 2010.