Well - here is my perspective.
Many religons teach that the spirit continues on after death, even though this is NOT a biblical teaching.
However, the idea spirits and ghosts have come from this
teaching. Therefore, if you are secular person with no belief in
God, then you have nothing to concern yourself with.
Ghosts do NOT exist. When a person dies, they are are dead. No part of them or thier conscienceness lives on.
Replace the flooring or carpet, or anything that is stained with that
past tragedy and enjoy your new home. you have NOTHING to worry
about.
Hope this helps.
1 Other Expert Agrees with this!