Corrections Minister Anne Tolley says there was no way to avoid spending more than $250,000 on the prison release of sex criminal Stewart Murray Wilson.
The 66-year-old was released from jail amid high public interest in August last year, but broke his release conditions and was sent back to prison after five-and-a-half months.
It emerged last week that Corrections has spent almost $270,000 on a house for Wilson, legal costs and upgrading the weak cellphone network to monitor him by GPS.
Mrs Tolley said on Tuesday although she was reluctant to spend the money, she had to do so for community safety.
The minister rejected calls by the Opposition for an audit of spending on the case, saying she knows exactly how the money was spent.