By Inspector Chris Butler (ret.) for Calibre Press | calibrepress.com

Part 1 of a 2-part series

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 him 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.

NEXT: More keys to understanding and spotting cognitive aggressors and how departments can build cognitive aggressor awareness into training.

About the Author

Chris Butler retired as an Inspector after 34 years in law enforcement. He 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.

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 was honored to be inducted into the National Law Enforcement Officer Hall of Fame in 2025 as Trainer of the Year.

You can learn more about Chris here.

Chris can be reached directly at chris@raptorprotection.com (for Raptor Canada)

or chris@raptorpublicsafety.com (For Raptor USA)