It just a murdering rapist but a fraudster, he got someone else to take the DNA test for him. I can't imagine that he is repentent, maybe he will have learned what to say when questioned on the subject. He had years of freedom after the murders. Had the woman who overheard the conversation not passed on the info to the police, or if.no one heard it then he might not have been caught for years
It is proba ly impractical but there should be an island where such people are sent, not prisons but no access to boats and no women in the shops or offices etc
So freedom in a tightly controlled envjeonment