Ahh it happens.
You should see some of the arrow heads that were pulled out of the walls of old houses up the line from me. Now tell me someone wasn't killed in those places.
I don't really beleive in ghosts, my grandparents built there last house on some indian graves. They had guys come down from Yale I think to remove the remains, never had an issue. Its not that uncommen in certain areas of my town to find these graves when digging foundations.
Having said that I was in one house about six months ago that gave me the creeps I just couldn't place it. Built in the late 18th century, with a lot of updating, but something just felt off...