Writing Mystery Fiction: Clues, Red Herrings, and Satisfying Solutions

Mystery fiction makes a promise: a question will be asked, and it will be answered. Who committed the crime? How? Why? The reader enters into a contract with the writer — they will try to solve the puzzle, and the writer will play fair. Writing a good mystery means honoring that contract while still delivering surprise.

The Rules of Fair Play

The mystery genre has well-established conventions about fairness:

The solution must be achievable. The reader should have access to all the information needed to solve the mystery, even if that information is disguised or buried among irrelevant details.
No secret evidence. Introducing a crucial clue in the final chapter that the reader had no way of knowing is cheating.
The solution must be logical. Once revealed, the reader should think “Of course!” — not “How could I have possibly known that?”
The detective should not be the criminal (with very rare, well-executed exceptions).

These rules create the puzzle-solving experience that mystery readers seek. Break them, and you break trust.

Plotting Backward

Most mystery writers start with the solution and work backward. You need to know:

Who did it? And why?
How was it done? The method.
What evidence exists? Physical clues, witness statements, timelines.
What seems to point elsewhere? Red herrings and false leads.

From the solution, work backward through the investigation, planting clues and misdirections along the way. An outline is particularly valuable for mystery writing — keeping track of what the reader knows and when they know it requires planning.

Planting Clues

A clue must be visible enough that the reader could notice it but disguised enough that they probably will not — at least not on first reading.

Techniques for hiding clues:

Burying in lists. Mention the crucial detail in a list of other details. The reader’s eye slides over it.

Emotional distraction. Place a clue immediately before or after an emotional scene. The reader is focused on the emotion and glosses over the evidence.

Misdirection. Draw the reader’s attention to one element of a scene while the clue sits quietly in another.

Double meaning. A detail that seems to mean one thing in context but means another when the full picture emerges.

Red Herrings

A red herring is a false clue — something that seems relevant but ultimately is not. Good red herrings:

Are logical and plausible (not obviously fake)
Have their own resolution (the reader learns why the herring was misleading)
Do not feel like a waste of time in retrospect
Serve the story in some other way (advancing character, creating tension)

A mystery without red herrings is too easy. A mystery with too many is frustrating. Balance is key.

The Detective Character

The detective — whether professional or amateur — is the reader’s surrogate. Their investigation structures the narrative.

Strong detective characters:

Have a unique investigative method or perspective (Sherlock’s deduction, Columbo’s deceptive bumbling)
Have personal stakes beyond solving the case
Have distinct voices and personalities
Are fallible — they make mistakes, follow wrong leads, and question themselves

Suspects and Interrogation

Each suspect should:

Have a plausible motive
Have opportunity (or seem to)
Have a personality that makes them interesting independent of their suspect status
Reveal themselves through dialogue during questioning scenes

The best interrogation scenes work on two levels: the detective is gathering information, and the reader is gathering character. Even the cleared suspects should leave the reader feeling they learned something about human nature.

Pacing a Mystery

Mysteries follow a natural rhythm:

The crime (or discovery of the crime) — fast
Initial investigation — methodical, establishing the playing field
Complications — pace increases as leads multiply and some prove false
Dark moment — the case seems unsolvable, or the detective is personally threatened
Breakthrough — a final clue or connection snaps into place
Resolution — the solution, the confrontation, the explanation

Within this framework, vary the pace. Tense action scenes alternate with quiet investigative scenes. Revelations are followed by reflection.

Common Mystery Mistakes

The unmotivated crime. If the reader cannot understand why the crime was committed, the solution feels arbitrary.

Too many suspects. Three to five suspects is the sweet spot. Fewer feels thin; more becomes confusing.

The detective who knows everything. If the detective is never wrong, there is no tension. Let them pursue wrong theories.

The implausible solution. A solution that requires coincidence, superhuman ability, or knowledge the criminal could not possess is unsatisfying.

Getting Started

Read mystery fiction voraciously. Study how established writers plant clues and manage information. Then write a short mystery story — a limited cast, a single crime, a contained setting. The short form teaches you to manage the information economy that mysteries require.

Once you can construct a satisfying mystery in 5,000 words, you are ready for a novel. The principles scale up — they just require more intricate planning.