I think if it was someone directly wronged they would be more likely to do it without any regard for consequences, maybe not even try to “get away with it” for example if your child lost their life because of a insurance claim that was denied. But I could be wrong. If they get away with it I’d lean toward professional as I doubt a regular person would get away with such i high profile murder, they’d likely slip up in some way or miss a detail that a pro wouldn’t. But I am just theorizing I could be way off.