Some people have skeletons in their closet that they do not wish known by others, ever. I am not suggesting these people have skeletons in their closet per se, but I know the lengths some people will go to in order to be perceived as good folk, even if it means causing immense pain to others in order to stop their truth coming out and put an end to all the speculating. I just wondered had genetic factors ever been considered. I know this aspect isn't often looked into in a murder case.