Robert Galbraith (J. K. Rowling) The Cuckoo’s Calling (post 2): a murder vs. suicide detective novel with the most glaring omission in the history of the genre

Lulu Landry, a supermodel who once cut her wrist, and who takes lithium for bipolar disorder, has fallen to her death from her balcony. Was it an accident, murder, or suicide? The police and official inquest have concluded that it was suicide. Now Lulu’s bother hires Cormoran Strike, private investigator, to prove that it was murder.

But the biggest mystery of this detective genre novel is why neither the police nor Strike investigate her psychiatric treatment, and why they never interview, or even mention, her psychiatrist. Had she been taking her medicine? Was the lithium level too high (possibly causing delirium and dizziness) or too low? Had she told her psychiatrist that she had been threatened or felt suicidal? Characters in this genre should want to ask such questions, even if the answers are only red herrings.

I cannot explain this glaring omission, and can only wonder if it reflects some quirk of the Cormoran Strike character or of Rowling’s Galbraith personality.