I believe in ghosts in fact I can talk to ghosts. I have had a few encounters with ghosts. I believe their just lost souls allot of times they have unfinished business on earth and once this business is done they will leave. Unless they don't know they are dead or lost then you have to somehow guide them to where they need to be. Ghosts allot of time will stay in a place they were killed if the murder was gruesome enough usually when that happens their lost or simply don't want to leave or know something you don't about who killed them.
this is my take on ghosts everyone is entitled to their opinion.