The incident came to light after the medical report of the accused, Naveen, was made public.
A resident of Bharat Nagar, Naveen is currently lodged in the district prison here.
His family has complained to the police in this connection but no action has been taken so far. The family has now approached the Chief Minister's Office.
Naveen's family has alleged that on July 28, jail warden Jogendra took the rape victim's father to the jail by impersonating him as a worker and allowed him to beat him.
On July 29 following court orders, Naveen's medical examination was conducted and it was found that he has sustained injuries and bruises all over his body.
Naveen's family has claimed that no FIR has been lodged against the accused.