Writing Mysteries: Plotting, Clues, and Red Herrings

Writing a mystery is different from writing any other kind of fiction. The mystery writer is making a promise to the reader: a puzzle is presented, and by the end, it will be solved. Every clue, red herring, and twist must serve that promise. The plot must be intricate enough to surprise but fair enough that the solution feels inevitable in retrospect.

This guide covers the craft of writing mysteries — from plotting to pacing to planting clues.

Starting with the Solution

Many mystery writers start with the solution and work backward. Knowing who did it, why, and how gives you a map for the entire novel. Every scene can be evaluated for whether it advances the story toward that solution.

Your solution should answer:

• Who: The identity of the perpetrator must be surprising but logically consistent with the evidence.
• Why: The motive must be compelling enough to justify murder. Greed, revenge, jealousy, and fear are the classic motives.
• How: The method must be plausible given the characters and setting.
• When: The timeline must be consistent with the alibis and evidence.

Planting Clues

Clues are the information that leads the detective — and the reader — to the solution. The art of clueing lies in hiding important information in plain sight.

Types of Clues

• Physical evidence: A fingerprint, a torn piece of fabric, a mud stain on a shoe.
• Behavioral clues: A suspect who lies about their whereabouts, a character who acts suspiciously.
• Testimonial clues: What witnesses say they saw or heard.
• Contextual clues: The time of death, the weather, the layout of the room.

How to Hide Clues

• Among irrelevant details: List the clue alongside several innocent observations. The reader will not know which detail matters.
• Disguised as something else: Make the clue look like a minor inconvenience or an incidental observation.
• Through misdirection: Draw attention to a different element while slipping the clue in quietly.
• In plain sight: The most elegant clue is one the reader sees but does not recognize as a clue.

Red Herrings

Red herrings are false clues designed to mislead the reader. They are essential to mystery writing — without them, the solution would be too obvious.

Effective red herrings:

• Are plausible: The reader must believe the red herring could be the solution.
• Serve a purpose: Each red herring should advance the plot or develop character, not just waste time.
• Are eventually explained: When the true solution is revealed, the red herring should also be resolved — the character was not the killer, but they were hiding something else.

Common Types of Red Herrings

The suspicious stranger who turns out to be innocent. The character with a secret that has nothing to do with the crime. The piece of evidence that seems damning but has an innocent explanation. The best red herrings misdirect without cheating — they are real clues that lead to a false conclusion because the reader interpreted them incorrectly.

Pacing the Reveal

Information should be released gradually. The pacing of revelations determines the rhythm of the novel.

The Three-Act Structure

• Act One: The crime is discovered. The detective is introduced. Initial suspects are established. The first clues appear.
• Act Two: The investigation deepens. Red herrings are planted and pursued. The detective hits dead ends. A major twist occurs around the midpoint.
• Act Three: The pieces come together. The detective identifies the killer. The final confrontation, where all clues are explained.

The Midpoint Twist

Around the middle of the novel, something should change everything the reader thought they knew. A key suspect is eliminated. A new motive is discovered. The detective realizes they have been pursuing the wrong theory.

The midpoint twist reenergizes the story and sends the investigation in a new direction. Without it, the middle of the novel risks becoming a tedious sequence of interviews and dead ends.

Writing Characters

The Detective

Your detective is the reader’s guide. They need to be intelligent but not infallible, determined but not obsessive, and interesting enough to carry a series.

Consider giving your detective:

• A personal connection to the case
• A flaw that complicates the investigation
• A contrasting partner or sidekick

The Killer

The best mystery villains are not monsters — they are ordinary people driven to extraordinary acts. The reader should understand their motive, even if they cannot condone their actions.

The killer should be:

• Present throughout the story
• Plausible as the perpetrator
• Motivated by something the reader can understand

Suspects

Every suspect needs:

• A plausible motive
• An opportunity — or a convincing alibi
• Something to hide (even if they are not the killer)

The Satisfying Ending

The ending must deliver on the promise of the puzzle. Every clue must be explained. The solution must be logical. The reader should feel that they could have solved it — if only they had interpreted the clues correctly.

After the solution is revealed, give the reader a moment to absorb it. The detective can explain the reasoning, the suspects can react, and the community can begin to heal.

Avoid these ending pitfalls:

• The culprit is a stranger: The killer should be someone the reader has met.
• The culprit confesses for no reason: The confession should be forced by evidence or pressure.
• New evidence appears at the last minute: All evidence should be present before the reveal.
• The solution requires information the reader did not have: The mystery must be fair.

Writing Dialogue in Mysteries

Dialogue in mysteries serves multiple functions. It reveals character, advances the plot, and — most importantly — conveys information. But the information must be conveyed naturally. Characters should not explain things to each other that they already know.

The best mystery dialogue sounds like real conversation while serving the puzzle. Suspects evade questions. Witnesses remember details selectively. The detective asks the same question in different ways to see if the story changes. Every line of dialogue should either reveal a clue or deepen a character.

The Role of Setting

Setting is not just background in a mystery — it is a tool for creating atmosphere, limiting possibilities, and shaping character. A locked room mystery requires a specific physical space. A small town mystery uses the community’s relationships as both obstacle and resource. A police procedural relies on the institutional setting of the department.

The best mystery writers use setting to enhance the puzzle. The isolated island in And Then There Were None makes the crime possible. The foggy streets of Victorian London in Sherlock Holmes stories create atmosphere and concealment. The setting should feel integral to the mystery, not interchangeable.

Common Mistakes in Mystery Writing

The most common mistake is making the solution too obvious. If the reader guesses the killer in the first chapter, the puzzle fails. The second most common mistake is making the solution impossible to guess — requiring information the reader never had. The balance between these extremes is the central challenge of mystery writing.

Another common mistake is the “villain monologue” — having the killer explain everything in a speech at the end. Modern readers find this contrived. Better to reveal the solution through action: the detective confronts the killer, the evidence is presented, and the killer’s response reveals the truth.

Summary

Writing a mystery requires careful planning, fair play, and a commitment to the reader’s experience. Start with the solution and work backward. Plant clues for the reader to find. Use red herrings to misdirect. Pace your reveals to maintain suspense. And deliver an ending that makes every piece click into place. The best mysteries feel inevitable in retrospect — and that inevitability is the result of deliberate, painstaking craft.

FAQ

Should I outline the entire mystery before writing? Most successful mystery writers recommend extensive outlining. The puzzle must be constructed carefully, with every clue placed intentionally. Outlining allows you to test the logic of your solution before committing it to prose.

How many suspects should I have? Three to five strong suspects is typical. Too few makes the solution obvious. Too many confuses the reader. Each suspect should have a credible motive and opportunity.

How do I avoid making the solution obvious? Give every suspect a plausible reason to be the killer. Make the actual killer’s guilt seem less likely than the red herrings. Hide the killer among the suspects rather than making them stand out.

Can the narrator be the killer? Yes, but this requires careful handling. The narrator cannot lie directly to the reader. They can omit, misdirect, and interpret events in self-serving ways, but outright deception breaks the contract with the reader.

What makes a great mystery? A great mystery is fair — the reader has all the information needed to solve it — but the solution is nevertheless surprising. The best mysteries are puzzles that feel inevitable in retrospect.

For a comprehensive overview, read our article on Agatha Christie Guide.

For a comprehensive overview, read our article on And Then There Were None.