That is pretty crazy. I'm sorry your friend lost her father in such a horrible way. I have wondered when you know a family is crazy and you just "think" they might need monitoring who do you call? There was one family that I knew were "off" just by looking at them. Many times I'd drive by and one or more would just be standing in the yard with completely blank look. Not a daydreaming look or a I'm stoned look but just a completely checked out look. It was about a year after I noticed them and started wondering how you find out if people like that are actually "ok" and being looked after, that the adult daughter killed the father. Apparently the whole family suffered from some kind of mental disability. I always wonder what I could have done to get them help. But who could I call and what do I say? "Those people appear to be crazy because they're always randomly standing in the yard staring into space. Can you go check on them?" And from what I understand they were already in they "system" but until someone actually snaps and does something like that, there isn't anything you can do.