Case File 209 · Investigation Psychology

What Does It Mean When Someone Changes Their Story?

By Murder Book Editorial TeamPublished by Gungrounds, the studio making Murder BookPublished 3 October 2026Updated 3 October 2026

A changed story is not proof that someone is lying. People revise what they say for many ordinary reasons. Memory is reconstructive and shifts a little each time it is recalled; a later telling can surface details that were always there but went unmentioned the first time; a clearer or kinder question can draw out more; and misleading information picked up between two tellings can quietly rewrite what a person believes they saw. Deliberate deception is only one possible reason among several, and the research is awkward for the stereotype: rehearsed liars are often more consistent than honest witnesses, not less. A story that changes is a reason to ask what changed and why, and to test it against independent evidence. On its own, it settles nothing.

Key takeaways

A story can change through normal memory processes, new questions, stress or the passage of time, so a change is not evidence of lying by itself.
Memory is not a recording. Each recall is a partial reconstruction, and small differences between two accounts are expected.
Remembering something on a later interview that was missed earlier (reminiscence) is a normal product of being questioned twice.
Misleading information between tellings can alter an honest memory without the person realising.
Consistency is a weak cue to deception: prepared liars can repeat a rehearsed account very consistently, while truthful people vary.
The useful response to a changed account is to ask what changed, why, and whether independent evidence supports either version.

Why do honest accounts change at all?

Human memory does not store events like video files that can be replayed unchanged. It reconstructs them, filling gaps with expectations and reassembling fragments into a coherent account. Because the reconstruction happens fresh each time, two honest tellings of the same event will rarely match word for word. Details get reordered, emphasised differently, or left out and then included.

This is why small discrepancies between statements are the normal background of real testimony rather than a danger sign. A witness who describes a car as "dark" on Monday and "navy blue" on Thursday has not necessarily contradicted themselves; they may simply have reached for a different word, or remembered more on reflection. For a fuller picture of why recollection works this way, see why memory is not a recording.

Is adding new details later suspicious?

Often it is the opposite of suspicious. Witnesses are routinely questioned more than once, and it is common to recall something on a later occasion that was not reported earlier. Psychologists call the recovery of new, previously unmentioned details reminiscence.

In a 2006 study, Gilbert and Fisher found that reminiscence is a natural product of being tested on two occasions, and that changing the retrieval cues between interviews increased the amount of new accurate detail that witnesses produced. The researchers stressed that seeing an instance of reminiscence in a real case should not, by itself, raise concerns that the memory has been tainted. In other words, "they mentioned something new the second time" is usually a feature of how repeated questioning works, not a sign of invention. Repeated questioning and how it reshapes memory looks at this in more detail.

Can questions and other people change a story?

Yes, and this is one of the more important reasons an honest account can shift. Elizabeth Loftus's long programme of research on the misinformation effect shows that exposure to misleading information after an event can impair or alter memory for the original event. In her 2005 review of thirty years of work, she described how misinformation can lead people to remember details that were never there, sometimes with confidence.

That means a story can change not because the person decided to deceive, but because a leading question, a news report, or a conversation with another witness introduced something that got absorbed into the memory. Two witnesses who talk to each other before being interviewed may end up with accounts that have drifted toward each other. When you are comparing two versions of events, it is worth asking what happened between them. Comparing witness accounts covers how honest testimonies can diverge and converge.

Does inconsistency actually catch liars?

This is where the folk belief runs into the evidence. The intuition is that liars trip over their own story while honest people stay consistent. Research on statement consistency does not support using it as a reliable cue.

Reviews of the field note that consistency is a poor diagnostic because a prepared liar can simply repeat the same rehearsed account, producing high consistency, while a truthful person who is genuinely reconstructing the event will vary. Aldert Vrij and colleagues have argued that, rather than waiting for inconsistency to appear on its own, interviewers get more traction from techniques that make it harder for a liar to repeat a rehearsed script — for example asking for an account in an unexpected format such as a sketch, which is difficult to reconcile with a memorised verbal story. The point is not that inconsistency never matters, but that its presence or absence does not cleanly separate truth from lies.

The broader cue research points the same way. DePaulo and colleagues' 2003 meta-analysis of 158 possible behavioural cues to deception found that most links to deceit were weak or absent, and consistency was not a strong exception. How investigators look for inconsistencies explains why a contradiction is treated as a lead to pursue, not a conclusion.

So when does a changed story matter?

A change in someone's account matters when it can be checked against something independent. If a new version conflicts with a time-stamped record, physical evidence or an unrelated witness, that is worth investigating — but what carries the weight is the independent evidence, not the fact of the change itself. A changed story can also matter when the way it changes is informative: whether the new version only ever shifts in one convenient direction, whether it absorbs details that were fed to the person, or whether it tracks genuine new recall.

The honest takeaway is the modest one. A changing story raises a question. Answering it requires more than noticing the change. People detect lies at only about 54% accuracy on average, little better than chance, so treating a revision as a confession is exactly the kind of overconfidence the research warns against. For the wider evidence on this, see whether you can actually tell when someone is lying and why there is no single reliable sign of deception.

How does a changing story play out in an interrogation game?

Murder Book: The Art of Interrogation is built around exactly this ambiguity. It is an upcoming narrative interrogation game from Gungrounds, an independent studio in Zagreb, Croatia, inspired by real police footage and psychological interviews. Its press kit names behaviours such as Narrative Gaps and Fabrication among the things a player learns to notice, and development screenshots show a casebook with entries like Stonewalling and Emotional Fading.

The design leans on the same lesson as the research: when a suspect's account shifts, the game treats it as a thread to pull, not a verdict to deliver. You can ask what changed, press for the detail that would make one version checkable, and weigh it against the evidence you have already connected — while several explanations stay possible at once. A revised story might reflect a lie, or a cleared-up confusion, or a memory nudged by your own earlier question. Cases are designed for focused 5–10-minute sessions. Murder Book is in development for PC (Steam) and mobile, with release currently planned for the end of Q2 2027.