Castration of a child-killer has suggested by a lawyer as an option for his client.
The suggestion was made at a recent parole hearing for Peter Holdem, who is serving a life term for abducting and murdering six-year-old Louisa Damodran in 1986.
Holdem's lawyer's name is being withheld by the Parole Board.
But during last month's hearing, the lawyer told the board that since there are no appropriate interventions left, options overseas should be considered.
He suggested that options such as aversion therapy or castration, either physical or chemical, need to be investigated.
Psychologists believe Holdem still poses a very high risk of sexual reoffending and the Parole Board has decided he cannot seek parole again for two years.
The board has previously described the murder as one which shocked the nation.
Louisa Damodran would now be 31 years old. She disappeared while walking home from Bromley School and it took three weeks for the Waimakariri River to give up her body.
She was dumped there, just weeks after Holdem was freed from prison for the abduction and attempted murder of another girl.
Retired Detective Inspector Mal Griebel, who led the murder inquiry, calls Holdem the worst criminal he ever dealt with.
He told Nine to Noon that Holdem is evil and said he believes castration will not prevent him re-offending.
Holdem next becomes eligible for parole in April 2013.