Chandrima Dey, wife of the ASI Kishore Dey, alleged that Kishore was summoned by the SDPO Shailesh on Tuesday and was beaten up after some wards in the guest house located in Krishnanagar, police said.
"The victim's wife has lodged a complaint against the SDPO and investigation is going on," said Nadia SP Sabyasachi Raman Mishra.
The ASI is now under treatment at police hospital.
Kishore, posted in Krishnagar Police lines, was in-charge of the Police Line Guest House for some days where the SDPO had put up since the firing incident and attack on his house.
The accused official has refuted to the allegations levelled against him.
"Although I met ASI on Tuesday morning, this type of incident did not happen," Shailesh said.
Police fired several rounds at Tehatta, about 200 kms from Kolkata, on November 14 morning in which one person was killed and three others were injured.
Eight policemen were also injured in the clash.
Locals had gathered to protest against the police refusal to grant permission to organise a religious function at a particular spot.
