TCOLE study materials
TCOLE study resources

TCOLE cheat sheet

TCOLE · Keep the key ideas within reach.

Quick reference

Professional Policing, Professionalism, and Ethics

  • TCOLE is the Texas Commission on Law Enforcement; it sets minimum licensing standards, administers the state peace officer exam, and regulates continuing education.

  • The IACP Law Enforcement Code of Ethics states an officer's primary duties are to protect life and property, prevent crime, and preserve the peace while enforcing the law impartially.

  • Brady v. Maryland requires disclosure of exculpatory evidence; Giglio requires disclosure of evidence affecting an officer's credibility, including dishonesty findings.

  • Texas Code of Criminal Procedure Art. 2.131 prohibits racial profiling and requires agencies to adopt policies, collect traffic-stop data, and report it.

  • Texas law imposes a duty on officers to intervene to stop another officer's excessive force and to report it; retaliation against a reporting officer is prohibited.

  • Texas Penal Code Chapter 39 covers offenses by public servants, including official oppression and misuse of official information, which can affect TCOLE licensure.

  • Off-duty conduct remains subject to agency policy and TCOLE license standards when it reflects on an officer's fitness to serve.

  • Ethics decision rule: an action must be lawful, within policy, and publicly defensible; if any element fails, do not take the action.

Quick reference

Legal Foundations: U.S. and Texas Constitutions, Penal Code, Code of Criminal Procedure

  • The Fourth Amendment requires warrants to be supported by probable cause, oath or affirmation, and particularity; recognized exceptions include consent, exigency, automobile, and search incident to arrest.

  • Texas Constitution Article I, Section 9 protects against unreasonable searches and seizures and may be interpreted to provide greater protection than the federal Fourth Amendment.

  • Texas Code of Criminal Procedure Art. 38.23 excludes evidence obtained in violation of the U.S. or Texas Constitution or laws; Texas has no broad statutory good-faith exception.

  • CCP Art. 14.01 allows warrantless arrest for an offense committed in the officer's presence or view, including felonies and offenses against the public peace.

  • CCP Art. 14.03 provides additional warrantless arrest authority, such as for suspicious persons, protective-order violations, and family violence assault.

  • Miranda warnings are required before custodial interrogation; custody exists when a reasonable person would not feel free to leave, and interrogation includes words or actions likely to elicit incriminating responses.

  • Texas Penal Code culpable mental states are intentionally, knowingly, recklessly, and criminal negligence; the offense definition specifies which mental state applies.

  • Penal Code Chapter 9 governs self-defense, deadly force, protection of property, and arrest and search; use must be immediately necessary and reasonable under the circumstances.

  • A search warrant under CCP Art. 18.01 requires a sworn affidavit establishing probable cause and a magistrate's particular description of the place and items to be searched or seized.

Quick reference

Patrol Operations, Traffic, and Criminal Investigation

  • A traffic stop is a Fourth Amendment seizure requiring reasonable suspicion or probable cause of a traffic violation or criminal activity; its scope and duration must be limited to the purpose of the stop.

  • Whren v. United States holds that a traffic stop is valid when probable cause exists, even if the officer's subjective motive is pretextual; Texas racial-profiling laws still prohibit selective enforcement.

  • Texas Transportation Code Sec. 543.001 permits a peace officer to arrest without a warrant a person found committing a traffic violation in the officer's presence.

  • Texas requires a crash report when a collision causes injury, death, or property damage of at least $1,000; officers document scene, statements, and contributing factors.

  • DWI investigation uses standardized field sobriety tests: horizontal gaze nystagmus, walk-and-turn, and one-leg stand; implied consent applies, and refusal may require a blood-search warrant.

  • Crime scene management requires securing perimeters, protecting evidence, photographing before movement, sketching, and documenting all conditions and personnel.

  • Reports should be factual, chronological, objective, and complete, including the elements of the offense, witness observations, and all actions taken.

  • Chain of custody is a documented chronological record of evidence handling; gaps or undocumented transfers can undermine authenticity and admissibility at trial.

Quick reference

Use of Force, De-escalation, Crisis Intervention, and Officer Wellness

  • Graham v. Connor requires objective reasonableness, judged from the perspective of a reasonable officer on scene, considering the severity of the crime, immediate threat, and active resistance or flight.

  • Tennessee v. Garner limits deadly force against a fleeing suspect to situations where the officer has probable cause that the suspect poses a significant threat of death or serious physical injury.

  • Texas Penal Code Sec. 9.51 permits force reasonably believed immediately necessary to make a lawful arrest or prevent escape; deadly force is limited to imminent threats or specified felony circumstances.

  • De-escalation uses time, distance, cover, concealment, tactical repositioning, and communication to reduce intensity when feasible; it does not require officers to accept unreasonable risk.

  • Crisis intervention includes recognizing behavioral health signs, using active listening, containing the scene, and considering emergency detention under Texas Health and Safety Code Chapter 573 when imminent danger exists.

  • After a use of force, officers must render or summon appropriate medical aid, monitor the person, and document injuries and aid provided.

  • All reportable force incidents require documentation and supervisory review; body-worn camera activation and retention follow agency policy and law.

  • Officer wellness includes critical incident stress awareness, peer support, employee assistance programs, sleep, fitness, and early help-seeking after traumatic events.