Lies And The Liars Who Tell Them

What Lies and the Liars Who Tell Them Actually Gets Right

I spent way too many years reading case files where someone confessed to something they didn't do. Not from malice, not from strategy, but because their own mind had been talkedit into believing a false memory. The 2022 documentary Lies and the Liars Who Tell Them (the original Swedish title is Hela häxan) covers some of this ground pretty directly. It isn't a comprehensive academic treatise, but it gets the mechanism right: interrogation techniques, particularly the kind that isolate a suspect for hours and feed them details of a crime before they've said a word, can literally rewire what someone remembers. That's not speculation. That's Garry et al., Lovett, Shaw — the whole line of false memory research going back to the 1990s. The documentary focuses on cases like that of Ken McFarland in the UK, where a man spent years in prison for a murder he didn't commit, partly because repeated coercive interviewing left him unable to distinguish what actually happened from what he was told happened. There are other cases covered too. The film doesn't shy away from the fact that trained interviewers can plant memories with a surprising degree of success, especially in vulnerable populations. That's the core insight, and it's one most people in the justice system still haven't absorbed. Here's the thing most summaries leave out. False memory implantation doesn't require dramatic coercion every time. Subtle leading questions, repeated exposure to fabricated details, even the simple act of being told someone else remembers something differently — these all nudge the brain toward confabulation. The brain hates gaps. Fill one and it will happily invent the rest to make the story coherent.

I worked a case a few years back where a witness was absolutely certain about a license plate number. Three months later, when we revisited the interview with a completely different interviewer using a cognitive interview protocol, she couldn't produce the number at all. When pressed gently, she admitted the original interviewer had said, "So it was a blue Honda, right?" during a break in the questioning. The witness had incorporated that detail into her memory of the event. No one lied on purpose. The memory just got rewritten. This happens more often than anyone wants to admit, and the documentary touches on this dynamic without necessarily drilling all the way into the neurology of it. If you want to watch Lies and the Liars Who Tell Them, it's available on Netflix in most regions. The runtime is roughly two hours. It pairs well with reading about the Reid technique and its documented flaws if you want to go deeper. There isn't an official download link from the distributors that I'm aware of, and honestly I wouldn't recommend hunting for unofficial copies when it's sitting on a major streaming platform. The film itself is the primary resource here, not supplemental materials. The most useful takeaway isn't really about the film though. It's about recognizing how fragile your own memories are. Everyone assumes their recollection is reliable. It isn't. Every time you retrieve a memory, you're not playing back a recording. You're rebuilding the scene from scratch, and each rebuild introduces small errors that accumulate. That's called reconsolidation. The documentary references this concept, and it's worth paying attention to when you hear someone say, "I'll never forget that day."

One caveat. The film sometimes compresses timelines and simplifies legal procedures for narrative flow. Real false memory cases move through courts over decades, not weeks. The emotional beats land, but don't treat the documentary as a procedural manual. Pair it with peer-reviewed literature if you care about the actual evidence base. Kassin's work on confession psychology and McNall's research on suggestive interviewing are good starting points. The broader point is that the legal system still operates on the assumption that a confident confession equals truth. Confession confidence is not a reliable indicator of guilt. A person who has had a false memory implanted can be every bit as confident as someone telling the truth. The documentary makes this point clearly enough. What it doesn't fully explore is how training interrogators in non-suggestive methods like the PEACE model could dramatically reduce these kinds of errors in the first place.