This place right here is the very last place you'll find a local "expert".
Do these people have no friends or family they can talk to? They never say they've talked to anyone about their experiences.
When I started waking up with hallucinations, I went to a shrink who referred me to a sleep disorder specialist who solved my problem. If this had happened thirty years later, I'd probably have a blog talking about my experiences with ghosts or aliens.
In a lot of cases people dont have friends and family they can talk to, especially about these matters.