Vibha Tiwari is president of the Dibiyapur Nagar Panchayat. Rajbir Singh, Kanpur Mandal in-charge of the BSP, confirmed that she is a member of the party.

On Tuesday, the police sent her a notice, asking her to join the investigation and present herself for questioning. Since she was not at her residence, the notice was pasted on the door.

Inspector General of Kanpur zone Bhanu Pratap Singh, who confirmed that a notice had been sent, said, "We are now waiting to question her".

Attempts to contact Vibha Tiwari failed and her cellphone was switched off. Sources said that she had rarely been seen in the town after her husband's arrest on the evening of December 24.

Her security guard returned to police lines after he failed to find her on three consecutive days, said Additional SP Sooreshwar. The district administration had changed her guard after Gupta's murder.

The government dismissed Hoshiyar Singh, who was removed as station officer of Dibiyapur after the murder. Two security guards of the MLA Pal Singh and Gajraj Singh were also dismissed. All three will be booked under the Gangster Act, the police said. Hoshiyar Singh is on the run while the security guards are behind bars on the charge of conspiracy.

IPS officer Akram-ul Haq, who was SSP of Auraiya at that time, was placed under suspension for his failure to exercise proper supervision and control in the case, said DGP Vikram Singh. Former BSP district president Yogendra Kumar Dohrey, alias Bhatia, still remains elusive.

Besides the MLA, three of his henchmen — Manoj Awasthi, Vinay Tiwari and Pooti — were arrested on December 24. Gupta was killed allegedly because he failed to meet the MLA's demand for money for Chief Minister Mayawati's birthday which falls on January 15.