Still a Blind Spot in Officer Safety Training. (Neurobiology, Deception, and Implications for Officer Safety)
By Chris Butler (Raptor Public Safety Coaching Inc.); December 2025
Police officers always desire that the members of the public they interact with will respond positively, and cooperatively, to officer presence. Aggression is not a single phenomenon and there is a type of perceived ‘cooperation’ that is anything but peaceable. On the street, officers encounter very different types, or categories, of violent people: those who display emotionally charged behavior and those who stay eerily calm while planning, and carrying out, harm. Psychology and neuroscience describe these as primal (reactive) aggression and cognitive (instrumental) aggression.
Primal aggression is emotionally charged, biologically driven, and easy to see. Officers learn from training and the ‘school of hard knocks’ how to identify when the shit is about to hit the fan when interacting with primal aggressors. Cognitive aggression, on the other hand, is calculated, emotionally cold, and almost always disguised behind friendliness or apparent cooperation. Among individuals with psychopathic or sociopathic traits, this second type—cold, planned aggression—can be especially dangerous.
For law enforcement, this distinction is not academic. It has direct consequences for officer safety, particularly when officers are trained primarily to detect primal aggression cues and therefore miss the warning signs of cognitive aggressors who are “setting them up” for an assault or ambush. Following a presentation, I gave on primal and cognitive aggression at a major state academy, one of the participants, a senior homicide detective, asked me, through tears, if he could speak to me in private. He then went on to relay how his son, a junior state trooper, was murdered on a traffic stop by an offender who lured his son into complacency and successfully carried out a premediated ambush. Only now did his father realize that his son had not been trained to recognize cognitive aggressor behavior.
Primal Aggression: The “Hot” Attack
Primal aggression (also called reactive aggression) arises when a person feels provoked, threatened, disrespected, or cornered. It is driven by strong negative emotion—anger, fear, frustration—and is tightly linked to the amygdala, a limbic structure critical for processing threat and emotional salience.
When the amygdala perceives danger, it activates the fight-or-flight system via the sympathetic nervous system:
• Heart rate and blood pressure increase
• Breathing becomes rapid or shallow
• Pupils dilate
• Muscles tense
• Skin may flush or pale
• Voice may become louder, shaky, or strained
• Movement becomes less controlled—pacing, fidgeting, posturing
These physiological changes create automatic and uncontrollable visible pre-assault cues that many officer survival programs (appropriately) train explicitly: clenched fists, “target glances,” bladed stance and other postural changes, flaring nostrils, verbal threats or challenges, pacing, and nervous grooming or clothing adjustments.
Behavioural Indicators of Primal Aggression
Primal aggressors often show:
• Rapid escalation from calm to enraged
• Poor impulse control
• Shouting, profanity, or disorganized speech
• Obvious physical agitation and invasion of space
• Classic pre-attack body language (squaring up, fist clenching, jaw tightening)
Because their emotional arousal is high and poorly controlled, their aggression tends to be messy and obvious—and therefore relatively easier to detect if officers are paying attention.
Cognitive Aggression: The “Cold” Attack
Cognitive aggression (instrumental or predatory aggression) is essentially planned violence with a strategy. The person is not lashing out due to immediate emotional overwhelm; they are using aggression as a tool to achieve an objective—escape, status, revenge, or killing an officer.
Rather than the amygdala activation with primal aggression, instrumental aggression relies more on cortical systems, especially the prefrontal cortex and paralimbic circuitry, and less on the amygdala’s intense threat response.
Psychopathy, Sociopathy, and Cognitive Aggression
Research on psychopathy shows that cognitive aggressors often fall into the psychopathic and high anti-social personality profiles. These subjects typically exhibit:
• Excessive use of instrumental, planned aggression rather than impulsive outbursts
• Abnormal ‘blunted’ amygdala function, including reduced responsiveness to others’ distress and punishment cues
• Broader paralimbic dysfunction affecting emotional learning, moral decision-making, and a lack of the capacity for empathy
Because they do not experience fear or guilt the way most people do, and because their amygdala response is often severely blunted, psychopathic offenders can plan violence calmly, without the external agitation that usually accompanies primal aggression.
Behavioural Indicators of Cognitive Aggression
Cognitive aggressors frequently present as:
• Calm, relaxed, or even overly friendly
• Verbally polite, using humour or flattery
• Controlled in their body language; minimal obvious stress
• Strategically helpful, often without being asked —offering information, suggesting locations or positions
• Watching hands, distances, angles, or bystanders more than might seem normal
• Incongruent in affect (smiling while discussing serious matters, showing little fear when confronted)
• Forced and faked ‘empathy’ which an observer may detect
• Staging the scene for officer arrival – to direct or funnel the officers’ movements, access upon arrival (common especially in ‘suicide by cop’ encounters).
Instead of broadcasting “I’m about to fight,” cognitive aggressors display completely contrary behaviors. They work in ways to lower the officer’s guard, shape the environment, close the distance, and wait for a moment of advantage.
The Officer Safety Problem: Training for the Wrong Threat?
Modern officer-safety training does emphasize pre-attack indicators and physiological cues of assault, which is vital. Materials from LEOKA, state academies, and numerous trainers highlight the importance of reading behavioural and physiological signals that precede attacks. Certainly officer safety should include these concepts.
However, most of these cues are primal aggression cues: visible agitation, bladed stance, target glances, clenched fists, and other signs of sympathetic arousal.
That creates a dangerous blind spot:
If officers are conditioned to equate danger with obvious agitation, they may presume safety when a subject is calm, polite, or friendly—even when that subject is in fact a cognitive aggressor preparing an attack.
Presumed Compliance: When Friendliness Becomes a Weapon
Trainer Tony Blauer coined the term “Presumed Compliance” to describe the unconscious assumption that people will obey lawful commands simply because the officer wears a uniform and badge.
Key points of the ‘Presumed Compliance’ concept articulated by Blauer include:
• Most citizens do comply, which can create overconfidence and a false sense of security.
• Over time, officers may unconsciously expect compliance and become less tactically vigilant.
• This can degrade readiness: inducing complacency, presuming a subject is ‘compliant’ and creating relaxed and sloppy vigilance and tactics.
Officer safety resources and training videos explicitly warn about the danger of assuming a “nice, compliant” subject is truly compliant; many officers have been assaulted after lowering their guard with such individuals.
For cognitive aggressors—especially those with psychopathic traits—this is the perfect opening. They may:
• Display exaggerated cooperation (“No problem, officer, I totally understand”)
• Exhibit ‘undirected over-compliance’ – bizarre compliance behaviors without being asked by the officer
• Use humour or flattery to bond with the officer
• Comply slowly to manage timing and positioning
• Ask “innocent” questions or request small favours that move the officer into a high risk zone or away from cover
On paper, the subject looks like the “ideal compliant citizen” but in reality, the officer is being shaped and set up.
Ambush and Unprovoked Attacks: The Extreme Expression of Cognitive Aggression
Data from the FBI’s Law Enforcement Officers Killed and Assaulted (LEOKA) program and related reports show that a significant portion of officers feloniously killed die in ambushes or unprovoked attacks.
Recent national data indicate:
• From 2021–2023, more officers were feloniously killed than in any other three-year span in the last two decades, with many deaths involving firearms.
• Preliminary and annual summaries highlight ambushes and unprovoked attacks as leading circumstances in these killings.
• A study of 84 police officer murders in Canada found that over half of those murders involved ambushes and the majority of offenders had inferred traits consistent with psychopathy and/or anti-social personality disorder.
Ambushes, by definition, are planned, surprise attacks (that is, a surprise only to the officer), often characterized by:
• A staged environment (disabled vehicle, fake disturbance, or suspicious person call)
• Offenders who initially appear calm, cooperative, or non-threatening
• Use of distance, concealment, and timing to achieve a first-shot advantage against officers
This is cognitive aggression on full display. The offender’s goal is not to “win the argument”; it is to kill or seriously injure the officer. Their behaviour before the attack typically show almost none of the primal cues officers are taught to be vigilant for.
When officers equate “no visible agitation” with “no threat,” they become particularly vulnerable to these assaults.
Why Cognitive Aggressors Don’t Look Dangerous
Neuroscience helps explain why certain offenders can stay calm and even charming as they prepare violence:
• Psychopathic individuals frequently show altered amygdala functioning and impaired emotional learning, including reduced sensitivity to others’ fear and punishment.
• They are more prone to instrumental (planned) aggression than reactive aggression.
• Paralimbic and prefrontal abnormalities facilitate a style of decision-making that is cold, calculating, and detached.
In practical terms, this means that cognitive aggressors typically:
• Don’t feel the kind of fear and anxiety most people do when confronting law enforcement.
• Aren’t physiologically “lit up” by their own violent intentions—so classic fight-or-flight cues may be minimal or completely absent.
• Can use deception, flattery, and feigned compliance with little internal distress.
For officers who have learned to equate danger with visible emotional arousal, the cognitive aggressor is the worst possible adversary.
Cognitive-Aggressor Cues Officers Commonly Miss
While there is no single “tell” of a cognitive aggressor, certain patterns are worth emphasizing in officer training:
1. Overly Friendly or “Too Nice” Behaviour
o Excessive attempts at rapport: jokes, compliments, feigned respect.
o Incongruence between the seriousness of the situation and the subject’s casual, almost rehearsed calm.
o Undirected Over Compliance – over-eagerness to “help” the officer, including suggesting where to stand or how to handle the scene; bizarre body language such as a driver holding their left arm far out the window on a traffic stop, holding both hands in the air upon the arrival of the officer as if to say, ‘there’s no problem here, officer!’
2. Strategic Positioning and Movement
o Subtle efforts to move the officer: “Come over here where it’s quieter,” “Let’s talk by my car,” etc.
o Stepping to close distance under the guise of cooperation (e.g., leaning in with documents, moving closer while answering questions, smiling and joking).
o Steering the interaction toward areas with poor lighting, cover, or escape routes, or toward concealed weapons or accomplices.
3. Controlled Body Language with Micro-Signals
o Overall calm but with brief, sharp glances to hands, waistband, or specific environment points.
o Minimal fidgeting, but small preparatory movements timed with officer distraction (e.g., hand drifting toward a pocket while the officer looks away).
o Testing officer awareness by making subtle movements with the hands towards areas where a weapon is concealed to determine the officer’s level of responsiveness
o Carefully modulated voice—neither defensive nor submissive, but smoothly persuasive.
4. Information Management and Deception
o Providing elaborate explanations that were not asked for, or that feel rehearsed or overly detailed for simple questions.
o Answering questions quickly and smoothly, but with gaps around critical details (weapons, other subjects, destination, relationship to the scene).
o Contradictory statements that appear minor, tempting the officer to ignore them rather than dig in.
It is always the totality of circumstances which creates the important context in which an officer assesses risk and makes decisions. None of these cues, alone, prove a subject is dangerous. But in context—especially on high-risk calls or in ambush-prone situations—they may be far more relevant than whether the subject is “yelling or clenching fists.”
Building Cognitive-Aggressor Awareness into Officer Safety
To reduce assaults and ambushes, officer safety training can deliberately expand beyond primal aggression indicators and include specific cognitive-aggressor concepts.
- Train Against Presumed Compliance
• Explicitly teach that improper compliance is a tactic, not a personality trait.
• Use scenarios where “model citizens” suddenly attack after positioning the officer poorly.
• Train role players well to know how to exhibit the common cognitive aggressor behaviors prior to initiating attacks
• Use Socratic questioning to direct officer attention and intention to ensure they can describe the cues they observed and what they meant. - Keep Tactics Independent of Subject Demeanor
• Contact-and-cover roles, distance, cover, and weapon awareness should not be relaxed simply because a subject is calm and polite.
• Policies and training should emphasize subject demeanor doesn’t change your tactical excellence.
• Supervisors and FTOs can reinforce this by critiquing “nice but tactically sloppy” encounters as seriously as overtly dangerous ones. - Highlight Ambush and Unprovoked Attack Patterns
• Incorporate current LEOKA and national fatality data into training—especially case studies involving ambush – such as fake disabled vehicles, staged disturbances, suspicious person calls or seemingly benign contacts.
• Emphasize that the absence of visible agitation is typical and presence of cognitive aggressor behaviors will be present in pre-planned attacks. - Expand “Pre-Attack Indicators” to Include Deception and Setup
Traditional pre-attack indicators (bladed stance, target glances, clenched fists) remain vital.
But training should add:
• Environmental pre-attack indicators: suspicious positioning of vehicles, unusual requests to move the officer, unexplained presence of other people or objects.
• Deception cues specifically linked to imminent aggression, as previously mentioned, and style training to include dedicated deception/pre-attack behaviors. - Integrate Neuropsychology into Scenario Design
Obviously, we do not need to turn officers into neuroscientists, however trainers must understand these principles at a deep level and be able to explain to officers that:
• Some offenders (especially psychopathic or highly antisocial) may not show normal nervousness around police.
• Their aggression is instrumental, not emotional; they will smile, overly cooperate, and remain calm while planning to kill and even while carrying out the attempt.Scenario training can then intentionally feature “charming” suspects who suddenly launch an attack after drawing officers into a tactically poor situation.Conclusion: The Silent Killer: Seeing the Threat That Isn’t Shouting
Primal aggression is typically loud, messy, and emotionally obvious. Cognitive aggression is quiet, controlled, and often hidden behind friendliness. Both can kill officers, but our traditional training and intuition are usually highly tuned to the primal, not the cognitive, threat.The science of psychopathy and instrumental aggression explains why some offenders can calmly plan and carry out violence without displaying the amygdala-driven fight-or-flight signs officers are used to watching for. LEOKA data and officer safety literature on ambushes, pre-attack indicators, and presumed compliance show the tragic consequences when these threats are missed.
The path forward is clear:
• Keep teaching primal pre-attack cues—but don’t stop there.
• Explicitly train cognitive-aggressor awareness and the dangers of presumed compliance.
• Anchor tactics excellence—distance, cover, positioning, contact-and-cover—in sound procedure, not subject demeanor.Officers cannot afford to equate “calm and friendly” with “safe.” In a world where some individuals use charm, compliance, and planning as weapons, survival increasingly depends on recognizing the threat that isn’t shouting.
References
Neurobiology, Psychopathy, and Aggression
Anderson, N. E., & Kiehl, K. A. (2014). Psychopathy and aggression: When paralimbic dysfunction leads to violence. Current Topics in Behavioral Neurosciences, 17, 369–393.
Blair, R. J. R. (2001). Neurocognitive models of aggression, the antisocial personality disorders, and psychopathy. Journal of Neurology, Neurosurgery & Psychiatry, 71, 727–731.
Blair, R. J. R. (2008). The amygdala and ventromedial prefrontal cortex: Functional contributions and dysfunction in psychopathy.
Blair, R. J. R., et al. (2006). The development of psychopathy.
Glenn, A. L., & Raine, A. (2009). Psychopathy and instrumental aggression: Evolutionary, neurobiological, and legal perspectives.
Raine, A. (2013). The Anatomy of Violence: The Biological Roots of Crime. Pantheon.
Siever, L. J. (2008). Neurobiology of aggression and violence. American Journal of Psychiatry, 165(4), 429–442.
Blair, R. J. R. (2006). The Psychopath: Emotion and the Brain.
Anderson, N. E., & Kiehl, K. A. (2014). Psychopathy and aggression: When paralimbic dysfunction leads to violence. (Chapter in Neuroscience of Aggression).
Officer Safety, LEOKA, Ambush, and Pre-Attack Indicators
FBI Uniform Crime Reporting (UCR) Program. Law Enforcement Officers Killed and Assaulted (LEOKA), including 2023 Special Report and related FAQs.
FBI LEOKA. Ambushes and Unprovoked Attacks on Law Enforcement Officers.
National Law Enforcement Officers Memorial Fund. 2023 End-of-Year Preliminary Law Enforcement Officers Fatalities Report.
LEOKA / Peace Officer Safety Institute. Pre-assaultive Behavioral & Physiological Cues.
Police1 / Calibre Press. “10 non-verbal signs all officers should be able to recognize and interpret.”
POLICE Magazine. “Pre-Attack Indicators.”
Ti Training. “Pre-Attack Indicators: A Training Guide to Reading Body Language for Officer Safety.”
Idaho POST. Recognizing Pre-Attack Indicators course description.
Force Science Institute. “Rethinking ‘Show Me Your Hands!’”
Van Allen, J. & Parent, R. (2024). Unveiling a Tragic Reality: A Review of Police Murders from 1980 to 2023.Presumed Compliance and Officer Safety Mindset
Blauer, T. “The Theory of Presumed Compliance.” Calibre Press.
North Carolina Justice Academy. Patrol Techniques / Officer Safety Readiness materials referencing presumed compliance.
Officer.com. “Presumed Compliance: Officer Survival Tip.”
Avila, B. “Presumed Compliance and Training.” The Backgate.
Peace Officer Safety Institute / LEOKA. Officer Safety Awareness Training materials.
Public Intelligence. Officer Safety Issues (examples of staged ambushes involving seemingly innocuous scenarios).
Calibre Press. Street Survival Series: Deception Cues and Pre-Attack Indicators.About the Author
Chris Butler retired as an Inspector after 34 years in law enforcement.Prior to joining municipal law enforcement, Chris was a Search and Rescue Technician for six years responsible for conducting high angle mountain rescue, swift water rescue and avalanche rescue. During this time Chris was involved in developing and delivering intensive training for Search and Rescue Technicians. This began his passionate study into human factors, human error, decision making and effective motor learning.
After joining policing, Chris became a full-time instructor in the academy, teaching both recruits and in-service police officers a variety of physical use of force techniques as well as combat firearms instruction. For the last several years of his career, Chris developed and instructed advanced Incident Command training to Sergeants, Staff Sergeants and Inspectors.
Chris has an extensive background in law enforcement use of force and has been certified as an instructor or instructor trainer in numerous incident command, firearms, physical combatives, less lethal/chemical agents and emergency vehicle operation disciplines. In addition, Chris has worked with law enforcement trainers at the local, state and federal and international levels.Chris has made presentations at National and International law enforcement conferences and has been qualified in court as an expert in firearms safety, police firearms training, law enforcement use-of-force training and evaluation. Chris has testified over 40 times as a use of force expert in criminal matters and coroner’s inquests pertaining to officer involved shootings and in-custody deaths.
Chris is also certified as a shooting incident reconstructionist through TriTech Forensics and the International Association for Identification.
As a result of working with some of the world’s best human performance researchers, coaches and practitioners, Chris developed the Advanced Methods of Instruction (MOI) for Training Practical
Professional Policing Skills course. Chris’s driving ambition is to ensure training methods for first responders are based upon the most current science and research in human factors and learning, and to ensure our valuable protectors have the skills needed to succeed and survive.
Chris was honored to be inducted into the National Law Enforcement Officer Hall of Fame in 2025 as Trainer of the Year.
When Chris is not working, you may be able to find him poking around in the back country of the Rocky Mountains.
For more information and to request training / presentations on this or other available topics,
Chris can be reached at chris@raptorprotection.com
NOTE: This article was first published in December 2025 in Calibre Press and can be found online here:
Part 1 – https://calibrepress.com/2025/11/are-you-training-for-the-wrong-threat-understanding-primal-aggression-vs-cognitive-aggression/
Part 2 – https://calibrepress.com/2025/12/training-to-see-the-threat-that-isnt-shouting/