Basically, leave their house and the evil spirit will be gone!
How you get rid of a ghost depends on your beliefs. I am a christian so I can offer you some advice. Go to the sites I posted in "source".
You may want to clean the house of all things not of God. Like the dream catcher and anything else God would not want you to have. This would be a good first step.
You can email me if you want, just make sure you leave an email for me to get back to you.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.