it would freak me out. Death by natural causes is one thing, murder and suecide is quite another.
I knew someone who bought a house where someone had hung himself, she didn't actually know when she bought the house, then one night she woke up and saw someone hanging at the bottom of her bed. It was only then that she did a bit of research and found out what had happened.
our house was new build about 10 years ago, and I'm sure it has a presence in it, because I often feel as if someone is watching me and things disappear, like my ring that literally disappeared off my finger for three months and then turned up on the kitchen floor one morning.