Correctional Services spokesman Manelisi Wolela has denied allegations that student leader Mcebo Dla.
The family of a Pietermaritzburg student nurse, whose body was found dumped in the bush in Richmond last month, is losing hope of ever seeing the person responsible for her death arrested.
Though the family has identified the person they suspected for the police, the police say they have not found conclusive evidence to take action against him.
The badly decomposed body of Mabuyi Buthelezi, a student nurse at Edendale Hospital, was found a month ago - more than a week after she went missing.
It is believed that she was battered and strangled.
Her brother Nkosingiphile Buthelezi said no one had been arrested for her killing a month later, and "the man we know for a fact is responsible for my sister's death is roaming the streets".
Buthelezi said they were beginning to lose hope of ever seeing the killer behind bars.
"'The pain of losing a family member is unbearable," Buthelezi said. "And it is even more heartbreaking when the family knows the killer and he is walking freely and enjoying life ."
Buthelezi disappeared on April 8 while she was on her way to meet her sister in Durban. She never arrived. It is alleged that she was kidnapped before she could board a taxi to Durban.
At the time of her disappearance her boyfriend was questioned by police but released.
Police spokesman Vincent Mdunge said: "Though the family claims to know the suspect the police must have evidence to prosecute and that cannot be done through word of mouth."
Mdunge said the police were busy with investigations.