How do the police solve Maggie's murder in the novel, Written in Bone?

Once she gets wind of the murder investigation, she conducts various poorly-hatched schemes, always hoping to uncover a front-page story. She is annoying to the police but still manages to become friends with Hunter. She also discovers certain important secrets before the police do. Eventually she is murdered by Grace Strachan in a moment of insane jealous rage. Afterward, Maggie's dictaphone allows the police to unravel the mystery.