Not necessarily, Bran. Years ago, maybe about 15 or so, our kids' otrthodontist went nuts and shot 2 of his 3 kids to death, wounded his wife. He was stuck in a looney bin for several years and is now out and living with his wife and remaining child.
Yes, it took place just around the corner from where we lived, too! The next door neighbour was our municipal representative and an Anglican priest. He testified that he'd noticed the doc becoming increasingly unspooled lately, extrememly tense, overworked, blah, blah. His name is Ernie Fedon ( the ortho guy) if you care to look it up on the web. It happened more like 20 years ago now that I think of it.
Anyway, it was really close to home for us. The morning that it happened, Ted (hub) was walking to the subway (we had just heard it on the news) and he met our dentist who was Ernie's best friend. Ted told him about the news and our dentist freaked out right there on the street.
As for Mrs. Fedon, I think she realised that her husband had suffered from a mental sumpthin'. I don't think I could have taken the guy back after THAT, but everybody's different.