There was a famous case in the 80's of a murder being solved by a Psychic.

I think it was Spain or France and basically a ghost told this psychic exactly what happened.

The police had zero to go on, then this woman got in touch and described in vivid detail whom had killed who, with clothing descriptions and everything despite not knowing the victim's outfit or what the killer was wearing, it was that accurate that relatives knew whom the person was from the description and he admitted the killing.

The idenity of the woman remained a guarded secret and she was invloved in other investigations until she passed away (she was in her 70's).

I will try and find her name out / article link.