I haven't knowingly worked with anyone who was convicted of murder, but a friend once confessed that he had served a long prison sentence for it. It wasn't as grisly or premeditated as the one you describe, but it had the same outcome for the victim. I had to decide, do I reject this person, who clearly regrets what he did two decades ago, so that he only has the company of other criminals to associate with, or do I respect the good work that the social workers have done to rehabilitate him into society, while not overlooking the fact that there was a victim involved? I chose to do the latter. If it was my workplace I don't know what I would have done. Certainly, my previous boss was a psychopath, but she has the law on her side!