Evidence board: how to map research or a mystery

What an evidence board is—and what it cannot prove

The familiar picture is a pinboard covered with photographs, notes and string. A digital version replaces pins with cards and thread with connections. Either way, the board is a working map of information, not a machine for turning a plausible story into a fact. Two items placed together can invite a useful question without establishing that one caused the other.

People also search for detective board, conspiracy board, murder board or crazy wall. Those labels evoke a dramatic visual style, particularly in mystery fiction. For an actual research project, “evidence board” or “research map” is a clearer description. This guide is about organizing research and invented stories, not investigative procedures or making allegations about real people.

Unlike a mood board, which establishes a creative feeling, an evidence board asks what supports a claim. A beautiful arrangement is secondary to a traceable source, an accurate date and an honest account of what remains unknown.

Start with one question and a boundary

Write the question before gathering images. “What changed in the garden between the two visits?” gives you a reason to include photographs, weather notes and maintenance records. “Everything about the garden” does not. Add the time period and the kind of decision the board should support, such as choosing what to inspect next rather than explaining every possible cause.

For a fictional mystery, choose a question such as “Which events must happen before the missing letter is discovered?” Decide whether you are building the author’s complete account or the protagonist’s incomplete understanding. Put that distinction at the top. Otherwise, a clue known only to the author can accidentally enter a scene before the character has encountered it.

• Scope: the question, time span and places included.
• Exclusions: appealing material that belongs to another project.
• Output: a scene outline, a research summary or a short list of checks.
• Review point: when you will reconsider the working explanation.

Leave an “outside this question” area for tempting detours. A useful board does not need to consume every source you have collected. Its boundaries should make the next action easier to see.

Make source cards that survive rearranging

Give each item a stable identifier, such as S01 or S02, and keep one main observation per card. Record the source title, creator when known, original link or file location, relevant page or timestamp, and the date you accessed it. Distinguish the date an event happened from the date someone wrote about it. If the date is uncertain, say so instead of placing it precisely on a timeline.

Observation

What the source actually contains: “The west gate appears closed in the afternoon photograph.”

Interpretation

What you think it might mean: “The gate may have been closed for maintenance.”

Question

What would help resolve it: “Is there a maintenance record for that day?”

Keep a quotation distinct from your paraphrase, and preserve enough surrounding context to revisit the meaning. A cropped screenshot is convenient but can hide the date, conditions or qualifications that matter. Retain the original source separately and make the card a doorway back to it, not a replacement for it.

The guide to organizing research visually offers another way to move from a pile of saved material to a focused question. The same principle applies here: every reference needs a reason to occupy the board.

An evidence board template with six working areas

Begin with this layout on paper or a digital canvas. Use area names rather than color alone, so the structure remains understandable when printed or viewed by someone who interprets the colors differently. You can rearrange it later; the initial layout should simply prevent observations and guesses from blending together.

1. Question and scope: one sentence, the relevant period and the intended output.
2. Source material: numbered cards with photographs, excerpts or other records and their origins.
3. Timeline: dated events, with uncertain dates explicitly marked rather than silently guessed.
4. Working explanations: separate cards for competing possibilities, each with supporting and conflicting sources.
5. Open questions: missing records, ambiguities and assumptions that need checking.
6. Next actions: a source to read, a comparison to make or a fictional scene to revise.

In the fictional garden example, S01 might show a closed gate and S02 might be a note about new planting. Put “maintenance closure” in working explanations, not in the timeline as an established event. Add “find a dated work record” to next actions. That small separation keeps an attractive theory from acquiring the visual authority of a documented observation.

Connect relationships, not just matching details

Before drawing a line, complete the sentence “These items are connected because…” Use a specific relationship: “describes the same visit,” “contradicts this date,” or “offers a possible explanation.” “Looks similar” is a weaker connection and should remain a prompt to compare, not a conclusion. If you cannot explain the line, leave the items unconnected.

On a physical board, put a small relationship card beside the thread. In a digital tool, use a connection label if available, or an adjacent note. Distinguish sequence from cause: “happened after” does not mean “happened because of.” Avoid connecting every item to every other item; a dense web can make a thin argument look more substantial than it is.

Canvas Perch’s infinite canvas supports connections between cards and grouping selected cards inside a frame. You can keep a note beside a connection to explain the relationship and use frames for separate questions. Canvas Perch is in private preview with a waitlist; these are arrangement tools, not automated evidence assessment.

For a story, keep a second kind of relationship visible: what a clue means to the reader versus what it means to the character. A misleading interpretation can be intentional in fiction, but the author’s underlying sequence still needs to hold together.

Choose physical or digital without losing the sources

A physical board makes the whole arrangement visible without opening a file. It works well for a small set of printed material and a project you revisit in one room. Leave space around cards, use removable pins or tape, and keep a numbered source folder nearby. Photograph the board before a major rearrangement, especially if the old layout represents a different theory.

An online evidence board is useful when references need clickable sources or the arrangement changes often. Choose an evidence board maker by testing ordinary tasks: moving a card, recording a citation, distinguishing a hypothesis and finding an older item. A dramatic string effect is less important than a readable board you can maintain. Keep original files outside the layout as well.

If your material is primarily observations rather than a mystery, visual note-taking may offer a lighter structure. You do not need a detective-style wall to compare a few field notes and photographs.

Review fairly and protect real people’s privacy

When real people are involved, collect only information relevant to a legitimate, clearly defined purpose. Avoid adding private addresses, personal contact details or sensitive photographs simply because they are available. Consider who can see the board, what they actually need to know, and whether an anonymized identifier would be enough. Keep fictional characters clearly separate from real individuals.

Give conflicting evidence a visible place. Ask what would make you revise the explanation and whether several sources are repeating the same original account. Repetition is not independent confirmation. Remove unsupported accusations; do not treat a person’s presence in a photograph, association or visual proximity as proof of wrongdoing. This is a fairness practice, not legal or investigative advice.

• Can each claim be traced to its source rather than to a line on the board?
• Are uncertainties and alternative explanations still visible?
• Does the board distinguish dates, observations and interpretations?
• Can unnecessary personal information be removed before any sharing?
• What is the smallest useful next check, and what result would change your mind?