Vocabulary — Reading & Study
Words are tools. This page holds every key word for this part of the school, drawn from the lessons themselves: how to spell each word, what it means in plain language, and one sentence to remember it by.
See every vocabulary page in this school
After
Spells: A-f-t-e-r
What it means: action review — a structured examination of an incident after it ends, aimed at honest learning; the subject of Unit 4.
A sentence to remember it by: After-action review — a structured examination of an incident after it ends, aimed at honest learning; the subject of Unit 4.
Barricaded subject
Spells: Barricaded subject
What it means: a person who has taken a position inside a structure and refuses to come out, where the situation presents a serious danger.
A sentence to remember it by: The founding missions are hostage rescue, dangerous barricaded subjects, and high-risk incidents beyond patrol capability.
Behavioral threat assessment
Spells: Behavioral threat assessment
What it means: a fact-based process that identifies, assesses, and manages people whose behaviors suggest movement toward violence; it evaluates conduct and circumstances, never identity or traits.
A sentence to remember it by: Report the teammate's own words and behaviors exactly as you heard them, separate from your opinions.
Bystander reporting
Spells: Bystander reporting
What it means: passing observed concerning behavior to people designated to assess it; NTAC research finds bystanders often held information before attacks, and publishes guidance on making reporting safe and trusted.
A sentence to remember it by: Your job is the bystander's job, done promptly.
Chain of custody
Spells: C-h-a-i-n-o-f-c-u-s-t-o-d-y
What it means: the documented record of an item from collection through storage and transfers to court.
A sentence to remember it by: That unbroken record is the chain of custody, and gaps in it become cross-examination questions years later.
Component
Spells: C-o-m-p-o-n-e-n-t
What it means: one of the major organizational parts of DHS, such as FEMA, CISA, TSA, or the Coast Guard, each with its own defined missions and legal authorities.
A sentence to remember it by: Which component, acting under which statute, would do any of this?
Concerning behavior
Spells: Concerning behavior
What it means: observable conduct or communication that may signal distress or movement toward violence, and that merits assessment, not automatic punishment.
A sentence to remember it by: Concerning behavior — observable conduct or communication that may signal distress or movement toward violence, and that merits assessment, not automatic punishment.
Confrontation
Spells: C-o-n-f-r-o-n-t-a-t-i-o-n
What it means: the Sixth Amendment right of a defendant to face and cross-examine the witnesses against him.
A sentence to remember it by: The analyst is a witness subject to confrontation, subject to the notice-and-demand procedures the Court approved.
Department of Homeland Security (DHS)
Spells: Department of Homeland Security (DHS)
What it means: the cabinet department created by the Homeland Security Act of 2002, beginning operations March 1, 2003, bringing together all or part of twenty-two existing federal agencies and programs.
A sentence to remember it by: That origin explains the department you see today.
Deployment
Spells: D-e-p-l-o-y-m-e-n-t
What it means: the formal decision to activate the team for an incident, and the operation that follows from it.
A sentence to remember it by: Community trust spent on routine deployments is trust unavailable when a genuine rescue comes.
Deployment threshold
Spells: Deployment threshold
What it means: the written criteria an incident must meet before a tactical team may be used.
A sentence to remember it by: Community trust spent on routine deployments is trust unavailable when a genuine rescue comes.
Due process
Spells: D-u-e-p-r-o-c-e-s-s
What it means: the constitutional guarantee of fair procedures before government deprives a person of life, liberty, or property.
A sentence to remember it by: Due process — the constitutional guarantee of fair procedures before government deprives a person of life, liberty, or property.
Error rate
Spells: E-r-r-o-r-r-a-t-e
What it means: how often a method is known or expected to produce a wrong result; part of judging its reliability.
A sentence to remember it by: What is its known or potential error rate?
Expert witness
Spells: E-x-p-e-r-t-w-i-t-n-e-s-s
What it means: a witness permitted to offer opinions because of specialized knowledge, skill, experience, training, or education.
A sentence to remember it by: 1923) — the general-acceptance test for scientific expert testimony.
Federalism
Spells: F-e-d-e-r-a-l-i-s-m
What it means: the Constitution's division of power between the federal government and the states, leaving general police power primarily with states and localities.
A sentence to remember it by: Name the federalism point for the room.
Forensic science
Spells: Forensic science
What it means: the application of scientific methods to questions the legal system must decide, with results prepared for court.
A sentence to remember it by: Cases & codes to study — Forensic Science Frye v.
Fourth Amendment
Spells: Fourth Amendment
What it means: the constitutional protection against unreasonable searches and seizures, which governs stops, arrests, and searches including at the border.
A sentence to remember it by: At the top, write the Constitution (Fourth Amendment).
Gatekeeping
Spells: G-a-t-e-k-e-e-p-i-n-g
What it means: the trial judge's duty under Daubert and Rule 702 to admit only expert testimony that is reliable and relevant.
A sentence to remember it by: Fact: Daubert replaced Frye in federal court with Rule 702 gatekeeping.
General acceptance
Spells: General acceptance
What it means: the Frye test: a scientific principle is admissible when it is sufficiently established to be accepted in its field.
A sentence to remember it by: Myth: General acceptance is still the only federal test.
Grievance
Spells: G-r-i-e-v-a-n-c-e
What it means: a real or perceived wrong, loss, humiliation, or failure a person dwells on and blames on others; in NTAC's research, the common starting point of the pathway.
A sentence to remember it by: Is there evidence of grievance, ideation, planning, or preparation along the pathway?
Homeland security
Spells: Homeland security
What it means: the national effort, shared across government and community, to prevent, protect against, mitigate, respond to, and recover from threats and hazards that pose the greatest risk.
A sentence to remember it by: Public sources — Homeland Security Unit 1 U.S.
Hostage rescue
Spells: H-o-s-t-a-g-e-r-e-s-c-u-e
What it means: the resolution of an incident in which a person is held against their will as leverage; the founding mission of tactical teams.
A sentence to remember it by: The founding missions are hostage rescue, dangerous barricaded subjects, and high-risk incidents beyond patrol capability.
Immigration and Nationality Act (INA)
Spells: Immigration and Nationality Act (INA)
What it means: the 1952 statute, as amended, that organizes U.S. immigration law, including enforcement authorities.
A sentence to remember it by: Read generally, § 1357(a) gives designated immigration officers certain powers without a warrant.
INA § 287 / 8 U.S.C. § 1357
Spells: I-N-A-U-S-C
What it means: the statutory provision granting designated immigration officers defined powers, including certain warrantless interrogation, arrest, and border-patrol authorities.
A sentence to remember it by: INA § 287 / 8 U.S.C.
Leakage
Spells: L-e-a-k-a-g-e
What it means: a person's communication to a third party of intent, ideas, or plans to do harm; a concerning behavior NTAC teaches communities to report.
Where you meet it: in the lesson “Advocacy” in this school.
Management (in threat assessment)
Spells: Management (in threat assessment)
What it means: the plan that follows assessment: supports, services, monitoring, safety planning, and, where facts and law require, law-enforcement action — proportioned to what the assessment found.
A sentence to remember it by: For many people assessed, management means counseling, mentoring, academic or workplace support, family engagement, and follow-up over time — help, deliberately given.
Mission
Spells: M-i-s-s-i-o-n
What it means: the written, narrow statement of what a team exists to do; the standard against which each deployment is judged.
A sentence to remember it by: A mission statement with forty exceptions cannot.
Mission areas
Spells: M-i-s-s-i-o-n-a-r-e-a-s
What it means: the five organizing functions of national preparedness: Prevention, Protection, Mitigation, Response, and Recovery.
A sentence to remember it by: These are not obstacles placed in front of the mission from outside.
Mission creep
Spells: M-i-s-s-i-o-n-c-r-e-e-p
What it means: the gradual expansion of a specialized capability into routine work it was not created for.
A sentence to remember it by: A mission statement with forty exceptions cannot.
Multidisciplinary team
Spells: Multidisciplinary team
What it means: the group NTAC's guides recommend for assessments, drawn from several professions — administration, counseling, teaching, human resources, law enforcement — so no single viewpoint decides a case.
Where you meet it: in the lesson “Advocacy” in this school.
National Preparedness Goal
Spells: National Preparedness Goal
What it means: FEMA's published statement of what preparedness means for the nation: a secure and resilient nation with capabilities across the whole community in all five mission areas.
A sentence to remember it by: Myth: DHS is a single national police force.
National Threat Assessment Center (NTAC)
Spells: National Threat Assessment Center (NTAC)
What it means: the Secret Service research center, established in 1998 and authorized by Congress in 2000, that studies targeted violence and publishes prevention research and guidance for law enforcement, schools, and communities.
A sentence to remember it by: RAINN — 1-800-656-4673 — the National Sexual Assault Hotline, confidential support and referrals.
Notice
Spells: N-o-t-i-c-e
What it means: and-demand — a procedure requiring the defense to object in advance if it wants the analyst to testify in person.
A sentence to remember it by: Plan for the analyst's presence under the notice-and-demand rules.
NTOA
Spells: N-T-O-A
What it means: the National Tactical Officers Association, founded in 1983; a professional association that publishes training resources and standards discussions for tactical teams.
A sentence to remember it by: The standards movement — the push, led in public largely by the NTOA and echoed in U.S.
Oath of office
Spells: O-a-t-h-o-f-o-f-f-i-c-e
What it means: the sworn commitment of a federal official to support and defend the Constitution, owed to the Constitution itself rather than to any person or agency.
A sentence to remember it by: That oath is the frame for this entire track, so learn its load-bearing walls.
Oversight
Spells: O-v-e-r-s-i-g-h-t
What it means: the watching, reviewing, and correcting of executive action by Congress, courts, Inspectors General, and other accountability bodies.
A sentence to remember it by: It wrote oversight into the same statute that created the power.
Pathway to violence
Spells: Pathway to violence
What it means: the published research concept describing how a person can move from grievance, to the idea of violence, to planning and preparing, to an attack — with opportunities to intervene at each stage.
A sentence to remember it by: Prevention lives in the length of that pathway.
Peer review
Spells: P-e-e-r-r-e-v-i-e-w
What it means: evaluation of scientific work by other qualified scientists, one Daubert consideration among several.
A sentence to remember it by: Has it survived peer review and publication?
Port of entry
Spells: P-o-r-t-o-f-e-n-t-r-y
What it means: an official crossing point where people and goods present themselves for inspection and admission.
A sentence to remember it by: Officers at ports of entry inspect people and goods presenting themselves for admission.
Proficiency testing
Spells: Proficiency testing
What it means: regular testing of an analyst's work against known samples to confirm continuing competence.
A sentence to remember it by: Proficiency testing — regular testing of an analyst's work against known samples to confirm continuing competence.
Reasonable distance
Spells: Reasonable distance
What it means: the statute's phrase for the zone near an external boundary within which certain § 1357 conveyance authorities apply; a regulation defines it, for those purposes, by reference to 100 air miles.
A sentence to remember it by: Fact: The 100-air-mile figure is a regulation defining "reasonable distance" for particular statutory purposes.
Regulation
Spells: R-e-g-u-l-a-t-i-o-n
What it means: a rule issued by an agency under a statute; it sits below the statute and the Constitution in legal authority.
A sentence to remember it by: Fact: The 100-air-mile figure is a regulation defining "reasonable distance" for particular statutory purposes.
Statutory authority
Spells: Statutory authority
What it means: power that exists because a legislature enacted it; federal officers have only the authority Congress has granted.
A sentence to remember it by: Fact: The 100-air-mile figure is a regulation defining "reasonable distance" for particular statutory purposes.
Suppression
Spells: S-u-p-p-r-e-s-s-i-o-n
What it means: a court's exclusion of evidence obtained through a constitutional violation, one practical consequence when enforcement exceeds its limits.
A sentence to remember it by: Suppression — a court's exclusion of evidence obtained through a constitutional violation, one practical consequence when enforcement exceeds its limits.
SWAT
Spells: S-W-A-T
What it means: Special Weapons and Tactics; the common American name for a police tactical team, originating with the Los Angeles Police Department in the late 1960s.
A sentence to remember it by: Myths vs facts — SWAT Unit 1 Myth: Tactical teams were created to serve search warrants more safely.
Tactical team
Spells: T-a-c-t-i-c-a-l-t-e-a-m
What it means: a specially selected, trained, and equipped unit maintained for high-risk incidents beyond patrol capability.
A sentence to remember it by: The tactical option is one door among several.
Targeted violence
Spells: Targeted violence
What it means: premeditated violence directed at a specific person, group, place, or institution, as distinct from impulsive violence; the class of attacks NTAC works to prevent.
A sentence to remember it by: In study after study, NTAC found targeted attacks were usually the end of a process, not a sudden snap.
Toxicology
Spells: T-o-x-i-c-o-l-o-g-y
What it means: the study and measurement of drugs, alcohol, and poisons and their effects, including in body samples.
A sentence to remember it by: Forensic chemistry and toxicology identify substances and measure drugs, alcohol, and poisons in body samples.
Trace evidence
Spells: T-r-a-c-e-e-v-i-d-e-n-c-e
What it means: small materials — such as fibers, glass, or paint — transferred between people, objects, or places.
A sentence to remember it by: Around these sit document examination, anthropology, dental identification, and trace-evidence work with fibers, glass, and paint.
U.S. Border Patrol
Spells: U-S-B-o-r-d-e-r-P-a-t-r-o-l
What it means: the mobile, uniformed law-enforcement arm of CBP responsible for securing the borders between ports of entry.
A sentence to remember it by: INA § 287 / 8 U.S.C.
U.S. Customs and Border Protection (CBP)
Spells: U.S. Customs and Border Protection (CBP)
What it means: the Department of Homeland Security agency that unifies customs, immigration, border security, and agricultural protection at and between the nation's ports of entry.
A sentence to remember it by: INA § 287 / 8 U.S.C.
Validation
Spells: V-a-l-i-d-a-t-i-o-n
What it means: the testing that shows a laboratory method works as claimed before it is used on casework.
A sentence to remember it by: Validation — the testing that shows a laboratory method works as claimed before it is used on casework.
Verification
Spells: V-e-r-i-f-i-c-a-t-i-o-n
What it means: review of a result by a second qualified person before a report issues.
A sentence to remember it by: Verification — review of a result by a second qualified person before a report issues.