American law provides two distinct avenues, civil and criminal courts, to address culpable conduct, so when should a human error -an equivocal mistake- lead to a prison sentence? Weapon confusion cases turn the line between civil and criminal culpability into a chasm where lives hang in the balance while courts, law enforcement agencies, media outlets, and the public spiral down the rabbit hole.

Criminal negligence resulting in a death, codified as manslaughter, occurs when a person disregards a known and unjustifiable risk of injury. Manslaughter cases require juries to probe into the subjective mind of the accused whereas intent is typically demonstrated by looking solely at the outcome. For example, an armed robber who stabbed his victim to death intended to commit a crime. However, if the attendant circumstances unequivocally indicate that an officer did not intend to use deadly force, does the death of another due to weapon confusion fit the requirements of criminal negligence?

Manslaughter charges reflect societal accountability principles because the criminal defendant was in control of the mechanism, conditions, and circumstances that led to the death like a target shooter who kills another because he failed to ensure a safe backstop for his bullets. In stark contrast, Kim Potter’s agency chose the weapons she carried, the holsters in which she carried them, the location of the weapons, the training required to carry them, and the level of proficiency required to possess them on duty. Further, the emergency that required her to act under extreme stress in time-compressed circumstances was unequivocally created by Duante Wright. Unlike the typical manslaughter defendant, Kim Potter did not have control over the mechanism and circumstances that led to her weapon confusion. So, how did she “disregard the known, unjustifiable risk” that led to Duante Wright’s death?

Efforts to understand human error started in 1890 when William James, the father of American Psychology, wrote in The Principles of Psychology, Volume 1, p.243, “not only is it the right thing at the right time that we thus involuntarily do, but the wrong thing also, if it be habitual.” James noted that “rehearsal” is insufficient in preventing these errors because the action is performed automatically. Errors usually occur when operating automatically or with little thought to the action such as when an officer, surgeon, or pilot is attempting to solve a critical problem in time compressed and consequential circumstances while their attention is focused on the solution and not the process.

Researchers in medicine, engineering, the aerospace industry, and nuclear energy have created a growing, robust body of research on errors - how people and systems have failed. That research, as well as everyday experiences, demonstrate that many of these errors are part of skilled behavior and they occur because they are part of skilled behavior. A person learning a new skill pays a great deal of attention to that skill but diligent, appropriate practice reduces vigilance as the behavior becomes automatic. Professionals rely on automatic behavior to focus on decisions or solve problems and therefore rely heavily on automated behavior under time compressed, stressful circumstances. This sets the stage for performance errors.

One type of performance error is categorized as a “slip.” Norman, D. A. (1981). Categorization of action slips, Psychological Review, 88(1), 1., provided a very comprehensive categorization of action slip errors noting, as did William James, that action slips occur when a well-formed habit is performed in inappropriate circumstances. Another type of “slip” is called a “capture” error where a more frequently or better learned sequence captures control. James

Reason (1990) labeled this a “slip” and also “capture” performance error. Reason, J., Human Error, 1990 Cambridge University Press. Wickens also noted that the action sequence that leads to capture errors is automated and not monitored closely by attention. Wickens, C., Helton, W., Hollands, J., Barbury, S. (2021) Engineering Psychology and Human Performance 5 th Edition, Routledge.

Most, like Norman and Reason, take a cognitive psychological approach to errors. Others take a more comprehensive approach focusing on ergonomics or systems errors as a result of a system or design factors. The former focus on training and perception under stress. The latter would examine whether the “L- shaped” pistol grip design of the Taser, the position of it on the belt, or the similarity of action performance between drawing a Taser and a firearm that led to weapon confusion-the “slip”- and drawing the firearm-the “capture.” Both approaches may be necessary to solve the weapon confusion problem.

An interesting aspect of slip errors is an inability to detect them until they are complete. A person intently focused on a threat may be completely inattentive to finer elements of the weight, shape, and color of the instrument they have in hand while focused on a rapidly evolving threat. The concept of “Brain Filtering” or “Sensory Gating” where important information is ignored or even suppressed as the brain focuses on more critical cues, was introduced by D. E. Broadbent, (1958) in his classical text, Perception and Communication, Pergamon Press. Human performance researchers and neuroscientists have since explained that once we conclude, even erroneously, that we are executing correct action, we disregard feedback indicating that we may have selected the wrong tool or weapon. Heald, J., Lengyel, M., & Wolpert, D. (2021), Contextual Inference underlies the learning of Sensorimotor Repertoires, Nature, 600, 489-493. Bourne and Yaroush, (2003), in a working document for NASA, noted the effects of distraction, cognitive overload, stress, and multitasking as

contributing to the inattention factor in action errors. Stress and cognition: A cognitive Psychological Perspective, IH-045, NASA/CR-2003-212282. Apply these principles to a police officer facing an escalating and perceived deadly threat who decides to draw her Taser and instead draws her firearm that she has drawn in training thousands of times.

Humans make errors. Surgeons perform “wrong site” surgeries, engineers disregard stop signals driving into loaded passenger trains, and pilots have landed planes on top of other aircraft. The law addresses these mistakes in civil courts, and these professions recognize such errors as reflections of the fallibility of human perception and performance under stress. These tragedies drive more training, process management, and research. If the bona fide errors of law enforcement officers are to be labeled criminal acts, perhaps the only way for officers to escape indictment and prison is to avoid any action under stress.

The Kim Potter trial examined the frailty of human abilities under pressure. Commentators and “experts” who dismiss weapon confusion as lacking scientific support or assign malicious motives for Potter’s clear error expose their anti-law enforcement bias. Those who ignore Duante Wright’s role pour accelerant on a societal inferno. Today they condemn a life-long public servant whose error was writ large on the national stage. Tomorrow they may pray for a rapid law enforcement response followed by decisive action under stress.


Recommended for you


We have changed our commenting system. If you do not have an account, you will need to create one in order to comment.

(0) comments

Welcome to the discussion.

Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
Don't Threaten. Threats of harming another person will not be tolerated.
Be Truthful. Don't knowingly lie about anyone or anything.
Be Nice. No racism, sexism or any sort of -ism that is degrading to another person.
Be Proactive. Use the 'Report' link on each comment to let us know of abusive posts.
Share with Us. We'd love to hear eyewitness accounts, the history behind an article.