SOLVED. A detective thriller about a detective who tries to solve a series of murders. The murders are peculiar in that the murderer frees any caged bird at every crime scene. [s]

[ZZ]

I read this book 10 or 11 years ago in a paperback and I think it was published sometime in the 20th century. As far as my memory serves me right, there is a scene in which the detective was eating his breakfast which includes a grapefruit. < spoiler> The murders were resolved when the detective revealed that the murderer is diabetic and that the murderer unconsciously released the birds in order to free them from their misery. However, the murderer killed himself < /spoiler>

[Ayshe]

Cue for Murder maybe?

[SamSpayedPI]

Maybe Birdman by Mo Hayder? That's not what the murderer did with the birds, though.

[ZZ]

Yes, that's it! Cue for Murder by Helen McCloy. Thanks for the reply Ayshe and SamSpayedPI.