Get a grip, Everton. I'm not trying to be provocative in the slightest. You have your view, I have mine. Your question is not insensitive and neither was my answer.
As stated, we do not know where the act of murder was committed. We only know that it was disposed of in the Margate house. Even if the murder did take place there, what good can come from demolishing a house? Murders take place in houses all over the country. Your head is full of hocus pocus mumbo jumbo nonsense. The house will not be haunted, and things will not go bump in the night because a terrible event took place there. No offence (and I do mean that), but you're being rather silly and superstitious.