[energy4ever]

There has been one case I know of where the family reached out to a medium to find out what happened to their missing daughter, (aired in 2007) and he found the body.

I suspect or I assume that the Police are not working with Mediums but if they were to they have to keep it under wraps. I'm still hopeful that in the future science will find an explanation that more people can accept, we're all vibrating energy and energy is all around us, there is nothing made up about it. That consciousness survives death.
I hope they can better use the physical traces we leave behind to follow up and discover the body. We're leaving traces of us all over.
On a more positive note there is ongoing progress.

As to why this happens I think the reasons for it can be different, all designed individually, spiritually, on a bigger picture.