I’m trying to decide whether Midsomer Murders [0] follows these rules. I think it does with the possible exception of Rule 6 (no accidents or unaccountable intuition): DCI Barnaby often develops an intuition about a complex chain of events (usually multiple murders). Additional rules that seem to apply to Midsummer Murders include:

* If one of the suspects is a previously convicted hardened criminal, he will turn out to be innocent

* Any person identified as obviously guilty by Barnaby’s sidekick will turn out to be innocent

* If, early in an episode, Mrs Barnaby is seen to have acquired a new hobby, it will definitely be related to the murder in some way

[0] https://en.wikipedia.org/wiki/Midsomer_Murders