Mercer's swagger and bravado is symptomatic of his immaturity. I reckon by the time he reaches 30yo, he will be remorseful because he will understand by then that he has wasted his life as well as cut short the life an innocent boy.
In a civilised socity, the justice system should be about rehabilitation, not repudiation. I pray that he will see the error of his ways because if he does not, then he is truly lost and without hope.
As a society, we should really be worried about the fact that so many young people have no respect for their fellow beings and appear to be amoral as well as oblivious to the impact of their actions on themselves as well as their victims.
I pray that Rhy's family can find some sort of peace now.