Monday's Four Corners story "Second Chance Kids" is produced by PBS Frontline and looks at US teen criminals sentenced to life in jail."How much punishment is enough?" LawyerBeing tough on crime has become a popular mantra for political parties. Law and order debates are frequently fuelled by tabloid headlines calling for a crackdown on crime. The result is often harsher sentencing. In the United States it's led to thousands of prisoners facing mandatory life sentences for crimes they committed as teenagers."A super-predator is a young juvenile criminal who is so impulsive, so remorseless that he can kill, rape, maim without giving it a second thought." Forensic psychologistNow there's debate over whether these prisoners should be given a second chance at life."To say to any child of 13 that you're only fit to die in prison is cruel." US LawyerIn this compelling documentary, the film makers follow the cases of two of these now adult prisoners who expected to spend their entire lives behind bars."I was a bad kid. I was an angry kid. But I don't think I was so to the point where OK now you're going to be a kid that dies in prison." PrisonerWith exclusive access, the film closely documents their legal bid for freedom following a landmark court case."I've changed and I'm not the same individual. But I feel ashamed of what I did." PrisonerWe witness the confrontation between the perpetrators, guilty of murder, and the families of their victims in emotionally charged parole hearings."He was my only son and I'll never forgive him, ever!" Victim's motherAs juvenile offenders across the US await their potential re-sentencing, Second Chance Kids asks tough questions about crime and punishment."There are some people who should never be released…there are some crimes, in my opinion, that are so deleterious to our community that individuals deserve to go to jail for life." ProsecutorFor the two prisoners, their chance of a new life presents them with the challenge of how to live after decades behind bars.