TCOLE study materials
TCOLE study resources

TCOLE key terms

TCOLE · Get comfortable with the vocabulary.

Procedural justice

The principle that people judge police by the fairness of the process as much as by the outcome; it rests on giving voice, neutral decision-making, respectful treatment, and trustworthy motives.

Related: Discretion, Community policing
Discretion

An officer's lawful authority to choose among reasonable actions - warn, cite, arrest, or refer - based on the law, department policy, and the specific facts of the situation.

Related: Procedural justice, Reasonable suspicion
Law Enforcement Code of Ethics

The profession's sworn statement of principle committing officers to serve all people, protect life and property, and uphold constitutional rights with integrity and honesty and without favoritism.

Related: Noble cause corruption, Bias-free policing
Duty to intervene

The obligation of an officer to stop another officer's excessive force or serious misconduct when there is a realistic opportunity to do so, and to report the conduct through the chain of command.

Related: Deadly force, De-escalation
Noble cause corruption

Misconduct such as lying, planting evidence, or conducting unlawful searches that an officer justifies by claiming the ends - removing a dangerous person - justify the illegal means.

Related: Law Enforcement Code of Ethics, Chain of custody
Community policing

An approach in which officers build lasting partnerships with residents and address underlying neighborhood problems, rather than only reacting to calls after harm has already occurred.

Related: Procedural justice
Garrity protection

The rule that a public employee's compelled statements, given under threat of discipline, cannot be used against that employee in a later criminal prosecution.

Related: Duty to intervene, Miranda warnings
Bias-free policing

Making enforcement decisions based on behavior and specific suspect information rather than race, ethnicity, religion, gender, sexual orientation, or other protected characteristics.

Related: Discretion, Procedural justice
Reasonable suspicion

Specific, articulable facts plus rational inferences that would lead a reasonable officer to believe criminal activity is occurring or has occurred; it justifies a brief investigative detention.

Related: Terry frisk, Probable cause
Probable cause

Facts and circumstances that would lead a reasonable person to believe an offense has been committed and that a particular person committed it; it is required for an arrest or warrant.

Related: Reasonable suspicion, Warrant affidavit
Terry frisk

A limited pat-down of a detained person's outer clothing for weapons, permitted when the officer reasonably believes the person is armed and dangerous; it is not a full search.

Related: Reasonable suspicion, Plain view doctrine
Miranda warnings

Advisements of the rights to remain silent, to have counsel, and to appointed counsel that must precede custodial interrogation; statements taken without them are usually inadmissible.

Related: Exclusionary rule, Article 15.17 magistrate warnings
Exclusionary rule

The doctrine that evidence obtained through an unconstitutional search or seizure is generally inadmissible at trial, subject to exceptions such as independent source and good faith.

Related: Consent search, Miranda warnings
Plain view doctrine

Allows an officer who is lawfully present to seize an item without a warrant when its incriminating character is immediately apparent and the officer has a lawful right of access.

Related: Search incident to arrest, Exigent circumstances
Exigent circumstances

Urgent conditions - imminent destruction of evidence, hot pursuit, or an immediate threat to life - that make obtaining a warrant unreasonable and allow warrantless entry or search.

Related: Consent search, Plain view doctrine
Search incident to arrest

The authority to search a lawfully arrested person and the area within immediate reach for weapons and evidence, justified by officer safety and preventing destruction of evidence.

Related: Exclusionary rule, Plain view doctrine
Consent search

A warrantless search allowed when a person with authority gives voluntary, unambiguous consent; consent may be limited in scope and may be withdrawn at any time.

Related: Exigent circumstances, Exclusionary rule
Article 14.01, Code of Criminal Procedure

Texas statute permitting a peace officer to arrest without a warrant for a felony or a breach of the peace committed in the officer's presence or within the officer's view.

Related: Probable cause, Article 15.17 magistrate warnings
Article 15.17 magistrate warnings

Texas requirement that an arrested person be taken before a magistrate within 48 hours and warned of the right to remain silent, the right to counsel, and the right to appointed counsel.

Related: Miranda warnings, Article 14.01, Code of Criminal Procedure
Culpable mental states

The Texas Penal Code's four levels of intent - intentionally, knowingly, recklessly, and with criminal negligence - one of which must accompany the prohibited act for most offenses.

Related: Probable cause
Warrant affidavit

A sworn written statement of facts presented to a magistrate to show probable cause for an arrest or search warrant; false statements in it can invalidate the resulting warrant.

Related: Probable cause, Article 14.01, Code of Criminal Procedure
Chain of custody

The documented, unbroken record of who handled a piece of evidence, when, and for what purpose, from collection through trial, showing it was not altered or substituted.

Related: Offense report, Preliminary investigation
Standardized field sobriety tests

The three validated roadside tests - horizontal gaze nystagmus, walk-and-turn, and one-leg stand - used with other observations to build probable cause in impaired-driving investigations.

Related: Probable cause, Implied consent
Implied consent

Texas law treating a driver's license as consent to provide a breath or blood specimen after a lawful DWI arrest; refusal can lead to license suspension and to officers seeking a warrant.

Related: Standardized field sobriety tests, Warrant affidavit
Body-worn camera

A recording device worn by officers that captures encounters in the field, providing evidence, supporting report accuracy, and subject to retention and public release rules.

Related: Offense report, Duty to intervene
Active shooter response

The tactic for incidents in which someone is actively killing or trying to kill people; the first officers to arrive move directly to locate and stop the threat without waiting for others.

Related: Deadly force, De-escalation
Preliminary investigation

The first officer's actions at a scene: making it safe, aiding the injured, identifying witnesses, protecting evidence, and documenting what was observed and done.

Related: Chain of custody, Offense report
Eyewitness identification

The process of having a witness pick a suspect from a photo array or live lineup, conducted blinded and sequentially where possible to reduce suggestion and mistaken identification.

Related: Preliminary investigation, Offense report
Offense report

The official written record of an incident covering facts, statements, evidence, and actions taken; it supports prosecution and may be used to refresh an officer's memory in court.

Related: Chain of custody, Preliminary investigation
Objective reasonableness

The Graham v. Connor standard judging force by what a reasonable officer on scene would do, weighing the severity of the crime, the threat posed, and active resistance or flight.

Related: Deadly force, De-escalation
Deadly force

Force that the actor intends or knows creates a substantial risk of causing death or serious bodily injury; its use by officers is limited to situations the law specifically authorizes.

Related: Objective reasonableness, Duty to intervene
De-escalation

Using time, distance, cover, tactical repositioning, and clear communication to reduce the intensity of an encounter and avoid or minimize force when it is feasible to do so.

Related: Crisis intervention team, Objective reasonableness
Crisis intervention team

A model in which specially trained officers partner with mental health providers to respond to people in behavioral crisis, aiming to reduce injuries and divert people from jail.

Related: De-escalation, Suicide by cop
Positional asphyxia

Death caused by a body position that restricts breathing, such as pressure on the back or chest of a prone, restrained person; restrained subjects must be moved off their stomachs quickly.

Related: Conducted energy weapon, Rendering aid
Conducted energy weapon

A less-lethal device that delivers electrical current to disrupt muscle control and gain compliance from a resistant subject, subject to policy limits on when it may be used.

Related: De-escalation, Rendering aid
Critical incident stress

The physical and emotional reactions - nausea, exhaustion, intrusive thoughts, sleep loss - that officers may experience after a traumatic event such as a shooting or a child's death.

Related: Peer support
Naloxone

An opioid antagonist carried by many officers and given by nasal spray or injection to reverse a suspected opioid overdose, restoring breathing until medical help arrives.

Related: Rendering aid
Suicide by cop

A situation in which a person deliberately behaves in a threatening way toward officers, hoping to force them to use deadly force and end the person's own life.

Related: Crisis intervention team, De-escalation
Rendering aid

The duty to provide first aid or summon medical help for anyone injured during an encounter or in custody, once the scene is secure and the officer can do so safely.

Related: Positional asphyxia, Deadly force
Peer support

A program in which trained fellow officers provide confidential emotional and practical help to colleagues after critical incidents, aiming to reduce stigma and encourage early help-seeking.

Related: Critical incident stress