A Murder To Die For

By Stevyn Colgan

A darkly comic farce about a murder at a murder mystery festival

Tuesday, 21 February 2017

The Rules of Crime Fiction

While I was writing A Murder To Die For, I did quite a lot of research into the murder mystery genre. While I'd always enjoyed reading or watching  crime fiction, I'd never written one before - barring a few short stories - and I was keen to understand how such stories were put together by 'Golden Age' authors like Christie, Marsh, Chesterton and Sayers. And I discovered that there had been several genuine attempts to set 'rules' for detective fiction.

In 1928, the following list of 20 Rules appeared in the September edition of The American Magazine. They were written by author S S Van Dine (1888-1939) - real name Willard Huntington Wright) - whose wealthy amateur sleuth Philo Vance remains one of the most pompous, pretentious, insufferable detectives in fiction (Some of Van Dine's contemporaries noted that the character was not unlike the author). However, he was hugely popular.

So here are the rules (I have removed some of the finer detail to reduce reading time. If you want to see the full thing, click here).


Twenty Rules for Writing Detective Stories

1. The reader must have equal opportunity with the detective for solving the mystery. All clues must be plainly stated and described.

2. No wilful tricks or deceptions may be played on the reader other than those played legitimately by the criminal on the detective himself.

3. There must be no love interest in the story. 

4. The detective himself, or one of the official investigators, should never turn out to be the culprit. 

5. The culprit must be determined by logical deductions - not by accident or coincidence or unmotivated confession. 

6. The detective novel must have a detective in it; and a detective is not a detective unless he detects. 

7. There simply must be a corpse in a detective novel, and the deader the corpse the better. No lesser crime than murder will suffice. 

8. The problem of the crime must be solved by strictly naturalistic means. Such methods for learning the truth as slate-writing, ouija-boards, mind-reading, spiritualistic seances, crystal-gazing, and the like, are taboo. 

9. There must be but one detective - that is, but one protagonist of deduction - one deus ex machine. 

10. The culprit must turn out to be a person who has played a more or less prominent part in the story- that is, a person with whom the reader is familiar and in whom he takes an interest. 

11. Servants- such as butlers, footmen, valets, game-keepers, cooks, and the like - must not be chosen by the author as the culprit. This is begging a noble question. It is a too easy solution.

12. There must be but one culprit, no matter how many murders are committed. 

13. Secret societies, camorras, mafias, et al., have no place in a detective story. 

14. The method of murder, and the means of detecting it, must be rational and scientific. That is to say, pseudo-science and purely imaginative and speculative devices are not to be tolerated in the roman policier. 

15. The truth of the problem must at all times be apparent - provided the reader is shrewd enough to see it. 

16. A detective novel should contain no long descriptive passages, no literary dallying with side-issues, no subtly worked-out character analyses, no "atmospheric" preoccupations. Such matters have no vital place in a record of crime and deduction. 

17. A professional criminal must never be shouldered with the guilt of a crime in a detective story. Crimes by house-breakers and bandits are the province of the police department - not of authors and brilliant amateur detectives. 

18. A crime in a detective story must never turn out to be an accident or a suicide. 

19. The motives for all crimes in detective stories should be personal. International plottings and war politics belong in a different category of fiction.

20. And (to give my Credo an even score of items) I herewith list a few of the devices which no self-respecting detective-story writer will now avail himself of: 

  1. Determining the identity of the culprit by comparing the butt of a cigarette left at the scene of the crime with the brand smoked by a suspect.
  2. The bogus spiritualistic seance to frighten the culprit into giving himself away.
  3. Forged finger-prints.
  4. The dummy-figure alibi.
  5. The dog that does not bark and thereby reveals the fact that the intruder is familiar.
  6. The final pinning of the crime on a twin, or a relative who looks exactly like the suspect.
  7. The hypodermic syringe and the knockout drops.
  8. The commission of the murder in a locked room after the police have actually broken in.
  9. The word-association test for guilt.
  10. The cipher, or code letter, which is eventually unravelled by the sleuth.


Okay, have you got all that? Good. 

Then, in 1929, the British author and theologian Ronald Knox also made an attempt to create his own (mercifully) shorter Ten Commandments for Detective Fiction. They are that:

1. The criminal must be mentioned in the early part of the story but must not be anyone whose thoughts the reader has been allowed to know.

2. All supernatural or preternatural agencies are ruled out as a matter of course.

3. Not more than one secret room or passage is allowable.

4. No hitherto undiscovered poisons may be used, nor any appliance which will need a long scientific explanation at the end.

5. No Chinaman must figure in the story.

6. No accident must ever help the detective, nor must he ever have an unaccountable intuition which proves to be right.

7. The detective himself must not commit the crime.

8. The detective is bound to declare any clues which he may discover.

9. The ‘sidekick’ of the detective - the ‘Watson’ - must not conceal from the reader any thoughts which pass through his mind: his intelligence must be slightly, but very slightly, below that of the average reader.

10. Twin brothers, and doubles generally, must not appear unless we have been duly prepared for them.


But of course, dear shedfolk, rules are made to be broken ... aren't they? 



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Anna Lawrence
 Anna Lawrence says:

And if it is televised always make it the most famous "guest" on the show. I can spot 'im who did it in the first ten minutes of Midsomer Murders!

posted 21st February 2017

Stevyn Colgan
 Stevyn Colgan says:

Ha ha! So true! Mrs C is infallible when it comes to guessing whodunit. It's either (a) the most famous person in the non-regular cast, or (b) someone who 'always plays a baddie', or (c) the person driving the 'sinister' non-American car e.g. BMW, Mercedes etc.

posted 21st February 2017

Jenny Doughty
 Jenny Doughty says:

Dorothy Sayers broke the 'no love interest' rule very successfully when she introduced Harriet Vane to Lord Peter Wimsey.

posted 21st February 2017

Damon L. Wakes
 Damon L. Wakes says:

This is very interesting: I came across a similar handful of rules (not even ten) while looking into murder mysteries myself. Some were phrased closely enough to those in Van Dine's list that I imagine it must have become quite well known, but I don't remember actually seeing his name connected with them.

Checking the rationale for my project, I found my rules in "John Scaggs, Crime Fiction, (Abingdon: Routledge, 2005), p.27." Unfortunately I can't get at that book any more, so I don't know if Van Dine got a mention in there somewhere or if these things are simply so well established that nobody bothers to look back to whoever first wrote them down.

posted 21st February 2017

Rachel Wright
 Rachel Wright says:

There's one "Golden Age" book which is in fact centered around the murderer - "The 12.30 from Croydon" by Freeman Willis Crofts. You don't find out how the detective tracked him down until the last chapter. It's a rather disconcerting read!

posted 21st February 2017

Stevyn Colgan
 Stevyn Colgan says:

Well, as many of you know, I was a police officer for 30 years and I worked on genuine homicide investigations. Believe me, there are no rules! And, besides, every crime fiction writer broke a few.

posted 21st February 2017

Colin White
 Colin White says:

Very interesting; as are the comments to this post. I'd like to see a table of novels which counterbalances this list where each novel convincingly breaks each rule. Is there a novel that we can say breaks every one of them? Now there's a challenge.

posted 21st February 2017

Stevyn Colgan
 Stevyn Colgan says:

Colin - Wait until 'A Murder To Die For' comes out ... :)

posted 22nd February 2017

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