Ghost Informant

This is a novelette (12,900 words)

Sergeant Bob Crenshaw sees an apparition of a woman that sends him on a mission to investigate a murder--hers--that he’s not even sure has occurred. A plea from an apparition to find her sends this by the book policeman into uncharted territory, at least for him. The spirit of a dead girl attaches itself to him and his dreams and he can't rest until she does.

His only clues come from someone who’s not alive anymore so he enlists the help of a psychic. But that may not be enough to solve this case. The spirit sends him cryptic clues but can he figure them out, find her, and solve a murder?