I know there’s a strong anti-religious rhetoric now but if you take this at face value, isn’t it a good thing that a person that committed a crime shows remorse? The crime committed occurred 16 years ago in 2007. That’s plenty of time for someone to change their behavior.
On top of that, the police don’t have any evidence of this attack being linked to his criminal history. The poor man was stabbed to death by an early morning intruder into his home. It’s really no different than using criminal history as justification for a wrongful death involving the police.