Hang on fellas.
Say they let him out right now on his early release date.
And in two weeks he murders ten more innocents!
We would clammer for the heads of his parole board.
Lets look again and turn the question inside out.
If it is thought he may offend again has anyone the right to say he should be set free.

My thoughts are a radical re-think. Life should be 40 years, minimum 25 years before parole can be considered. Judges and lawyers out of it. No pay for them. We can volunteer and the prisoner can be questioned by an jury who decide whether he stays or goes.
I think I would have a better idea that some sleazy legal. Oh yes life time licence and if you associate with crims then back for the balance of the 40 years.
One other proviso more than two murders it is life without parole. I do not care if it was the same moment murder off you go forever.

I don't know what Knight did but I point out that we imprison for life
the insane. It seems to me that there could be reasons as good as
insanity that would justify "At Her Majesty's Pleasure".

Knight received a 27 year non-parole period for
killing 7 people and injuring 19 in the "Hoddle
Street Massacre." As Denis Napthine, the Victorian
Premier pointed out - it is "extremely unlikely"
that Knight would have received consideration for parole,
but the Victorian Government wanted certainty.

The Premier admitted that the current legislation is
unusual, but warranted in the circumstances.

The Premier stated that Knight has been a difficult prisoner
and declared a vexatious litigant. "He has a history of issues in
prison. He shows no remorse for the health, safety and well
being of his fellow men."

So, in answer to the question - "Is it right to
change a prisoner's sentence?" Yes, depending on the
circumstances. And in this case it appears to be warranted.
Parole, should be a privilege that is earned, not a right.

I agree that if he is deemed to be a risk to society, then he should not be given early release. I just hope that is a provision of his sentence.

Australia has a few prisoners serveing never to be released sentences
Would any of us like to see the Corby rapists set free?
What about those involved in another Sydney rape/Murder.
We also have seen 56 year sentences for gang rapes.
I think we must retain the rights of the public before worrying about criminals