I'm looking for this manga..... please help?

Well I'm looking for this manga i forgot the name of it its about this detective who finds a girl at a murder scene she doesn't know how she got there, then they later find out she has amnesia and is living in a hospital she can also see spirits/ghost she always appears out of nowhere ends up helping solve murder cases and stuff......please help!! I'm so frustrated trying to find it bout to punch a wall!