There's some things that you wouldn't tackle in a children's book because it would be beyond, not the mental capabilities, but the experience of someone under the age of say ten or eleven to encompass. But that field is smaller than you might think. They can easily cope with death and things like that; they know about it and it's a subject that often preoccupies them.
Terry PratchettThe nice thing about your police procedural as opposed to your classic murder mystery is that in a murder mystery you don't know who did it. Whereas in a police procedural you know, you know everything often and you're watching the police home in.
Terry Pratchett