A new feature-length film, The Lie, looks into the case and examines the rough sex defence used at Kempson's trial.
A 28-year-old man was yesterday jailed for life after being found guilty of murdering the British backpacker in his Auckland apartment.
Detective Inspector Scott Beard says the man jailed for her murder would have killed eventually.
He says it was the duty of the defence lawyer to put it forward.
The judge also explained what life imprisonment really means.
"One person has been locked away but are New Zealand women any safer?"
"Strangling someone for five to 10 minutes until they die is not rough sex."
The killer's fate has been revealed by Justice Moore.
Beard was at the forefront of the police investigation into Millane's death.
