Process of natural selection, they knew the penalty before they started, they are probably directly responsible for many deaths in Australia, as well as probably countless home break ins and robberies.
They are greedy scum bag drug dealers with no regard for anyone, not even sure why this has become such a big issue.
In relation to them reforming, well of course they reformed, the alternative is death, weak scum like these grubs will say and do anything to save their grubby hide, just like they will not hesitate to stick a needle into your kids arms if they can make fifty out of it with no regard for their life's and their family.
It's not like these guys were selling a bit of pot to their mates.