"I'm not a monster... I could never bring myself to do something like that"

Kira said he had no way to change his sexual attraction to little boys, but that he would never act on it.

Dr James Cantor, a psychologist specialising in atypical sexuality, said scientific evidence shows paedophiles are born, not made.

He told 60 Minutes that scientific evidence suggests paedophilia begins before birth, and despite every kind of treatment being tried for more than 100 years, nothing has been shown to change the aberrant desires of paedophiles.

Dr Cantor said the problem stems from some areas in the brain being wrongly connected up to the other areas they shouldn’t be networked to, and this can be seen using MRI imaging.