The girl initially supported the allegations of the students in the police station, however, she later retracted after her family members reached.
The University authorities have also ordered a probe into the incident.
The incident took place last night when a group of student activists barged into the house of the Associate Professor and allegedly found him in an objectionable position with a girl student.
The student activists pulled the teacher out of his house, smeared his face with cow dung and dragged him to the Colonelganj police station area of the city a few metres away.
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The teacher was also assaulted by the students on way to the police station.
At the police station, the girl student gave a statement alleging that she was called by the teacher to his house where he misbehaved with her.
However, Additional Superintendent of Police (City) Rajesh Yadav said,"the FIR lodged on the basis of the girl's complaint and her videographed statement, may have to be expunged as she retracted from her statement as soon as her family members arrived at the police station to take her back home".
"The girl, while retracting from her statement, has also alleged that she was pressured to lodge a complaint against the teacher, whose house she had visited out of her own accord.
"The entire matter is now under investigation," Yadav said.
Meanwhile, a high-powered committee has been set up by Vice Chancellor N R Farooqui who has asked its Chairperson Ranjana Kakkar to submit a report within one month.
Kakkar who also heads the varsity's Women's Advisory Board, has said, "we will try to complete the enquiry and submit a report much ahead of the deadline since the charges are of serious nature and reputations are at stake".