Mental Illness and Crisis

Mental illness can shape an edged-weapon encounter long before an officer sees a weapon. What matters is not simply whether a person has a diagnosis, but what information is available, what behaviour is occurring, and what options the circumstances allow.

Mental illness, behavioural crisis, suicidal intent, developmental disability, intoxication, and acute emotional distress can overlap, but they are not interchangeable. They can affect how a call is classified, what information reaches responding officers, how behaviour is interpreted, whether crisis resources are available, and what forms of communication or accommodation may be practical.

At the same time, mental illness does not by itself establish that a person is harmless, dangerous, unable to understand commands, or incapable of deliberate action.

The useful question is therefore not simply “Was mental illness involved?”

It is:

What was known, what was happening, and how did that information affect the available response?

Where it fits in the incident lifecycle

Mental-health information can matter at every stage.

Pre-Incident & Dispatch A caller may report a diagnosis, suicidal behaviour, medication issues, hallucinations, prior violence, developmental disability, communication difficulty, or a history of crisis. That information may influence call classification, priority, and whether specialized resources are considered.

Arrival & Approach Officers may arrive with detailed crisis information, a generic dispatch label, or very little information at all. What they observe on arrival may confirm, contradict, or substantially change the picture provided by dispatch.

Encounter & Intervention Mental state can affect communication, comprehension, response to commands, willingness to engage, perception of threat, and the feasibility of slowing or containing the encounter. Crisis-trained officers, co-responders, and negotiators may provide additional options where time and scene conditions permit.

Post-Incident & Analysis Investigators and reviewers may later have access to medical history, 911 recordings, CAD information, prior calls, family statements, and other facts that were not available to the officer during the encounter. Those later facts are important—but should not automatically be treated as information the officer possessed at the time.

What to know

1. “Mental illness” is not a threat category

A diagnosis does not establish whether someone presents an immediate threat.

A person experiencing a mental-health crisis may be frightened, confused, suicidal, aggressive, withdrawn, responding to hallucinations, unable to process instructions, or behaving in ways unrelated to a diagnosed condition.

Threat assessment still depends on the behaviour and circumstances of the encounter.

For edged-weapon incidents, that includes questions such as:

• Who, if anyone, is being threatened?
• Is the weapon directed toward the person, an officer, or another civilian?
• Is there an active assault?
• Is the person advancing, stationary, retreating, or contained?
• What is the distance to potential victims?
• What has changed since the initial call?

2. Information can be lost between the caller and the officer

Emergency information moves through a chain:

caller → call-taker → CAD → dispatcher → officer → officer perception

A family member may tell 911 that a person is suicidal, autistic, hearing voices, afraid of police, or unlikely to understand shouted commands. That does not necessarily mean every responding officer received that information.

Conversely, an officer may receive a simplified description—such as “male with knife”—that leaves out whether the knife was self-directed, whether anyone else had been threatened, or whether the caller reported a behavioural crisis.

For understanding an encounter, it is important to distinguish:

• what the caller knew;
• what was recorded;
• what was transmitted;
• what the officer actually received; and
• what the officer directly observed after arrival.

3. Crisis can affect the meaning of apparent noncompliance

Failure to follow a command does not always reveal why the person did not comply.

Possible explanations can include:

• deliberate refusal;
• inability to hear;
• inability to understand;
• cognitive or developmental disability;
• psychosis or severe disorganization;
• conflicting commands;
• physical incapacity;
• the effects of previous force; or
• insufficient time to recognize and respond to the instruction.

Those possibilities do not mean force is never justified. They mean that behaviour, capacity, time, and threat should be examined separately rather than collapsed into a single label such as “noncompliant.”

4. Time can create options—but only when the scene permits it

Where a person is contained and no one faces an immediate attack, additional time may allow:

• more information to be gathered;
• a family member or caregiver to be consulted;
• communication strategies to change;
• crisis-trained personnel or negotiators to respond;
• less-lethal resources to be positioned;
• civilians to be moved away; or
• officers to maintain distance while the situation stabilizes.

That does not create a universal requirement to wait.

An active assault, continued advance toward another person, immediate access to a victim, or other rapidly developing threat may leave little opportunity for extended dialogue or specialist response.

5. Specialized crisis resources are tools, not guarantees

Crisis Intervention Team training, mental-health co-response, and negotiation capability can expand the available response.

Their usefulness depends on circumstances.

They are most applicable when:

• the encounter allows communication;
• sufficient time exists;
• the scene can be contained;
• responders can safely maintain distance; and
• the person is able or willing to engage.

They cannot guarantee a peaceful outcome, and they do not replace immediate protective action when someone faces an imminent attack.

What the evidence can tell us

EWRL examines mental illness as one part of a larger incident sequence rather than as a standalone explanation for an outcome.

Relevant evidence may include:

• 911 recordings and transcripts;
• CAD entries and dispatch audio;
• officer body-worn camera;
• prior calls for service;
• statements from family members or witnesses;
• official investigative records;
• documented or reported mental-health history;
• observed behaviour;
• communication attempts;
• deployment of crisis resources;
• weapon posture and movement;
• distance and containment; and
• the sequence of events before force.

The strongest analysis distinguishes what was established contemporaneously from what became known only after the incident.

What the evidence does not establish

The presence of reported, suspected, or documented mental illness does not, by itself, establish that:

• the person was harmless;
• the person was dangerous;
• a weapon was intended only for self-harm;
• the person could not understand commands;
• the person was legally disabled;
• de-escalation would necessarily have succeeded;
• crisis personnel could safely have resolved the encounter;
• force was justified; or
• force was unjustified.

Those questions require additional evidence.

Questions to keep in mind

When reading about an edged-weapon encounter involving mental illness or crisis, ask:

What was reported before police arrived? Was the person described as suicidal, violent, confused, psychotic, disabled, intoxicated, or simply “acting strangely”?

What information actually reached the officers? Did dispatch communicate the crisis information, weapon information, threat target, and later updates?

What did officers observe for themselves? Did the scene look different from the dispatch description?

Who was at risk? Was the weapon directed toward the subject, police, a family member, a bystander, or no one?

Was the encounter containable? Could officers create distance and time, or was someone facing an immediate attack?

Could the person comply? Was apparent noncompliance deliberate, uncertain, or potentially affected by crisis, disability, communication difficulty, or previous force?

What options were actually available? Were crisis personnel, less-lethal tools, additional officers, cover, or containment available in time to matter?

The takeaway

Mental illness is context, not a conclusion.

It can affect the information available before police arrive, the meaning of behaviour after contact, the communication strategies that may be useful, and the options available to responding officers. But it does not answer the central questions by itself.

Understanding the encounter requires looking at what was known, what was observed, who was at risk, what options existed, and how those conditions changed over time.