"The correct man is locked up and will not be getting out any time soon, because he has never admitted to his crime"
Getting out has absolutely nothing to do with him not admitting his crime.
Luke has been in prison for Just over 15yrs, he is not even eligible to be considered for parole, for nearly 5 years yet.
This type of crime, even if he were to hold his hands up, to attempt rehabilitation is still unlikely to see him released, to be
accepted by any parole board - for a long time.
An example of this - someone else went to prison for a crime they pleaded guilty to.
They have been eligible for parole for over 9years now - refused at every hearing.
I don't imagine for one minute, that if Luke admits to this - he would be free anytime within the next 10yrs and he will know this.
It is not proof that he did not kill Jodi. This was not some simple murder, some accident - it was carried out by someone cold and calculated.
There may be many reasons pushed forward - to excuse how Luke has been since that very day, there has however been
nothing to show him as being anything else, bar caring for a sick hedgehog.
There hasn't, even in the most simplest of forms - been anything from his father or brother.