Many people have strong opinions about the power of the supernatural, which are crucial when they select a home. Beliefs about death does affect a buyer's comfort in a home, so they or their Realtors should make specific inquiries above and beyond the narrower obligations in the state law, which varies from state to state.
Consider those areas of the country where homes are over 100 years old - most homes would have this stigma. Owners of older homes may have no idea of this sort of past history. Concerned buyers may need to bring in their own advisors during their home inspection contingency, which could include a trusted spiritual advisors, exorcist, or Ghostbuster!