How To Use False Eyewitness Testimony in #Thrillers


Forensic Psychology is a fascinating field, especially as it relates to eyewitness testimony. Can we always trust our memory? Let’s test your observation skills. In this short video, count the number of times the ball is tossed from one white-shirt player to another. Sounds easy enough, right? Give it a try.

Well, how’d you do?

This phenomenon is called inattentional blindness. Your mind perceives what’s happening, but you do not attend to it. In other words, there’s nothing wrong with your eyes. But for some reason this information is more subconscious than conscious. The best known demonstration of inattentional blindness is a study performed by Simons and Chabris (1999) known as Gorilla in the Midst.  It’s highly copyrighted so I couldn’t embed it here, but if you’d like to check it out, click the title.

Imagine the implications inattentional blindness has on eyewitness testimony? Often times victims of violent crime are so focused on the gun they see little else.

Change blindness is another phenomenon that effects key elements of our surroundings, including the identity of the person right in front of us, even if that person has changed places with someone else. If you’d like to use change blindness in your WIP, check out The Door Study.

The implications of change blindness on eyewitness testimony could delay solving the crime. Always a good thing in thrillers. A detective could be led down numerous dead-ends, and so could the reader.

In a violent crime, “weapon focus” muddies the waters. Participants in another study watched a film of a kidnapping attempt. Would it surprise you to learn that actions were better remembered than details?Eyewitness testimony

Action Details

When we witness a crime, we absorb the information by the actions that happened during the commission of the crime. For example, a man pointed a gun at a woman, pushed her into his van, and sped away. The central information — what an eyewitness focuses on — and the peripheral information — what’s happening around said eyewitness — often becomes skewed with the surge of adrenaline.

Such findings suggest that when we witness a traumatic event, our attention is drawn to the central action at the expense of descriptive details. Yet, in other circumstances, such as non-violent events, our attention may be spread more evenly between the two.

Which brings us back to inattentional blindness. This phenomenon occurs when attention is drawn toward only one aspect of an eyewitness’ surroundings, resulting in lack of information. Which writers can use to our advantage.

Weapon Focus

The use of weapons complicate matters even more. When a gunman brandishes his firearm, an eyewitness tends to focus on the pistol rather than other details, such as the suspect’s hair and eye color, build and dress. Researchers have tested this theory, as well.

In the study, they showed participants videos of robberies — robbery involves a weapon and a victim; burglary does not— where one group witnessed the robber with a concealed pistol and other group witnessed the robber with the gun in plain sight. When researchers asked the concealed weapon group to identify the robber in a line-up, only 46% of participants could identify the suspect. From those who watched the video where the robber brandished the weapon, only 26% could identify him.


In order for an eyewitness to be able to answer a question, they must be willing to respond. And it’s this willingness that can impair their memory of the events. Not everything we “see” or “experience” is stored in our minds. Our brains don’t work like computers where each bit is encoded. Rather, we make connections to other things in order to process information. If you’re interested in learning more, I’ve written about Subliminal Messages on my blog.

Episodic memories — memories involving an event — are organized in our minds as “event schemas.” This allows us to store knowledge, events, and activities by connecting to what we classify as “normal.” In other words, rather than remembering every time we dined at our favorite seafood joint, we tend to build a general impression of seafood restaurants … the smell, the atmosphere, and so on.

However, the use of schemas can distort memories. The perfect example of this is when someone asks me about my childhood, then asks my brother. From our answers one might think we grew up in different households. Many factors contribute to how we remember times and events. Such as, influence. When gaps exist in our memory we tend to incorporate new information in an attempt to fill in the blanks. Although useful in everyday life, this poses real problems for investigators, because this new information is often constructed after the crime took place, and leads to false testimony.

I hope you’ve enjoyed this peek into Forensic Psychology. We’ve barely scratched the surface. Next time, I’ll share how an investigator should pose questions to an eyewitness. Perhaps you could use the techniques in your WIP. Would that interest you?

So, TKZers, how many of you saw the gorilla? Are you tempted to use false eyewitness testimony in your WIP?

This entry was posted in #amwriting, #writers, #writetip, #writing and tagged , , , , , by Sue Coletta. Bookmark the permalink.

About Sue Coletta

Sue Coletta is an award-winning crime writer and an active member of Mystery Writers of America, Sisters in Crime, and International Thriller Writers. Feedspot and named her Murder Blog as “Best 100 Crime Blogs on the Net.” She also blogs at the Kill Zone (Writer's Digest "101 Best Websites for Writers") and Writers Helping Writers. Sue lives with her husband in the Lakes Region of New Hampshire. Her backlist includes psychological thrillers, the Mayhem Series (books 1-3) and Grafton County Series, and true crime/narrative nonfiction. Now, she exclusively writes eco-thrillers, Mayhem Series (books 4-7 and continuing). Sue's appeared on the Emmy award-winning true crime series, Storm of Suspicion, and three episodes of A Time to Kill on Investigation Discovery. Learn more about Sue and her books at

20 thoughts on “How To Use False Eyewitness Testimony in #Thrillers

  1. GREAT post, Sue! I read it a few times to let it to sink in and then passed it along. I’ll also link to this one in my Writers References on my big site. Thanks!

  2. Wonderfule post, Sue. I often forget about eyewitness accounts being inherently problematic. Nice reminder. (I especially love how the gorilla pounds his chest toward the camera and still people miss it.)

    • Thanks, Staci. I just used false eyewitness testimony in my WIP yesterday, so I figured others might find it useful, as well.

      Hahaha. Love the gorilla, too!

    • But you’re a crime writer, Debbie! We’re supposed to see things other people don’t. Alas, that’s not always the case.

      Quick story.

      The other day, I was feeding 12 turkeys that strolled into my yard (word on the wildlife street is, if you’re hungry, go see Sue). The “ladies” crossed the road into a 5 acre parcel of wooded land. Moments later, two hunters crept down the street, crossbows in hand, and snuck into the woods. Which was posted, by the way. So, I dialed NH Fish & Game to report the illegal hunt. Because it was a Sunday, the office was closed.

      Immediately I snapped into stealth-mode to remember every tiny detail so I could report them on Monday. Illegal hunting infuriates me. Long story short, I had perfect recall of their descriptions and what they wore, but never looked for the model of truck. *facepalm* Some witness, eh?

  3. I was so proud of myself for counting the correct number of passes only to learn that I should have been watching other things! LOL! I did notice a larger black object, but was so focused on the white-shirt players that I didn’t even notice the curtain change colors! Great post! Thanks!

  4. Great post! I was so laser-focused on getting the right answer that I completely missed the gorilla.

    I will be using something like this in my next book when the murder victim is misidentified.


  5. Good to know what I’m doing, Sue.

    I am using the same technique in a different kind of story: a WWII epoch. In one arc, a B-17 is shot down. The missing Fortress is Montana’s Pride. It happens right in front of the entire formation. Yet, because of the fierce attack of the Jagdgeschwader (JG) 26, a Luftwaffe unit in France better known as the Abbeville Kids, no one can remember exactly where the Pride went down.

    Gunners and pilots can remember the strafing runs of each German fighter–they’re all accounted for–but dang bust, no one saw the Pride fall out of the sky. Was it burning? Did anyone count the ‘chutes? Did they all get out?

    Reconstructing the attack by the Abbeville Kids flying Luftwaffe Bf109 Messerschmitt fighters, was a difficult task because I had to remember what each gunner or pilot said.

    At times, it wanted me to forget the whole thing.

    • Wow, Jim. Sounds like a fascinating yet tragic story. Your personal connection will make it all the more memorable. Good for you, my friend. Write on!

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