In June, he pleaded guilty to the offence.
Jesse Kempson is a serial sex offender as well as a murderer.
"He was not who he said he was and nothing he said was true."
They say the stress contributed to David Millane's early death.
Kempson's former partner described him as "volatile", "scary" and "manipulative".
He will spend at least 17 years in prison for the British backpacker's murder.
The killer will be thrust back into the spotlight when name suppression ends and that is unfair, writes Mark Longley
He will keep his name secret, however.