DC Security Officer study materials
DC Security Officer study resources

DC Security Officer cheat sheet

DC Security Officer · Keep the key ideas within reach.

Quick reference

DC Criminal Law and Criminal Procedure

  • Standards ladder: reasonable suspicion to stop, probable cause to arrest, proof beyond a reasonable doubt to convict.

  • D.C. grades offenses by maximum penalty - felony: more than one year of imprisonment; misdemeanor: one year or less.

  • Simple assault, D.C. Code § 22-404: up to 180 days and/or a $1,000 fine; assault with a dangerous weapon, § 22-402: up to 10 years.

  • Robbery, § 22-2801: taking property by force or violence, or by putting the victim in fear; maximum 15 years.

  • Theft, §§ 22-3211 to 22-3212: value of $1,000 or more is felony theft (up to 10 years); under $1,000 is a misdemeanor.

  • Carrying a pistol without a license, § 22-4504(a): up to 5 years for a first offense; firearms must be registered under § 7-2502.

  • Bias-related crime, § 22-3701: where the offense is motivated by bias against a protected group, the maximum penalty may be raised to 1.5 times the base maximum.

  • Presentment: an arrestee is brought before a judicial officer without unnecessary delay, presumptively within 48 hours.

  • Intrafamily offenses (§ 16-1001) and civil protection order violations (§ 16-1005) permit warrantless arrest even when the act did not occur in the officer's presence.

Quick reference

Arrest Powers, Search and Seizure, and Citizen's Arrest

  • D.C. Code § 23-581: an officer may arrest without a warrant for a felony, for a misdemeanor committed in the officer's presence, and for enumerated offenses such as intrafamily offenses and CPO violations.

  • D.C. Code § 23-582: a private person may arrest for a felony committed in their presence, or on reasonable grounds to believe a felony was committed, and must deliver the arrestee to police or a judicial officer without unnecessary delay, using only reasonable force.

  • Probable cause = facts and circumstances that would lead a reasonable person to believe an offense was committed and that this person committed it.

  • Reasonable suspicion (Terry) = specific, articulable facts suggesting criminal activity; it authorizes a brief investigative detention, not a full search.

  • A frisk is a pat-down of outer clothing for weapons and requires reasonable suspicion that the person is armed and dangerous.

  • Search incident to a lawful custodial arrest covers the arrestee's person and the area within immediate reach (Chimel), for weapons and destructible evidence.

  • Plain view requires three elements: lawful vantage point, immediately apparent incriminating character, and lawful right of access to the item.

  • Warrant execution: execute within the time authorized (commonly 10 days), during authorized hours unless nighttime execution is approved, and return the warrant with an inventory.

  • Consent must be voluntary, given by a person with authority over the area, and may be limited or withdrawn at any time; officers may not exceed the scope granted.

Quick reference

Use of Force and De-escalation

  • Objective reasonableness (Graham v. Connor) is judged from the perspective of a reasonable officer on scene, under the totality of circumstances, without hindsight.

  • Graham factors: severity of the crime at issue, immediate threat to officers or others, and whether the subject is actively resisting or attempting to evade arrest by flight.

  • Tennessee v. Garner: deadly force to prevent escape is permitted only where the officer has probable cause to believe the suspect poses a significant threat of death or serious physical injury.

  • D.C. law limits deadly force to what is necessary to prevent imminent death or serious bodily injury to the officer or another person.

  • Force must be proportional to the threat, and de-escalation must be used where feasible; time, distance, cover, and communication reduce the need for force.

  • Neck restraints and chokeholds are prohibited, and officers have an affirmative duty to intervene in and report clearly excessive force by another officer.

  • Force progression: officer presence → verbal direction → empty-hand control → intermediate weapons (OC spray, baton, conducted energy weapon) → deadly force.

  • After force causing injury or a complaint of injury: render aid, request EMS, and document injuries and treatment in the use-of-force report.

Quick reference

Patrol, Observation, and Reporting Procedures

  • SARA problem-solving cycle: Scanning (identify the problem), Analysis (find causes), Response (tailor action), Assessment (measure results).

  • Crime triangle: offender, victim or target, and place - removing any one element reduces the opportunity for the offense.

  • Patrol modes: preventive/foot, directed (time-and-place based on analysis), hot spot (micro-locations), and saturation.

  • Observation records must capture time, distance, lighting, duration of observation, obstructions, and viewing angle.

  • Descriptions run top to bottom and flag unique identifiers: scars, tattoos, dental features, gait, voice, and clothing logos.

  • Transient details are recorded immediately: direction and means of travel, vehicle make/model/color/tag, and number of occupants.

  • Radio broadcasts use plain language, not agency codes: unit identification, location, nature of incident, suspect description, and direction of travel.

Quick reference

Report Writing and Evidence Handling

  • Report structure: who, what, when, where, why, and how, written in first person, past tense, chronological order.

  • Record sensory observations, not conclusions: 'a strong odor of an alcoholic beverage came from the subject's breath' rather than 'the subject was drunk.'

  • Each element of the offense must be supported by a specific, stated fact in the narrative.

  • Statements are quoted verbatim inside quotation marks and attributed to the speaker.

  • Corrections are a single line through the error, initialed and dated; whiteout, erasure, and obliteration are prohibited.

  • Chain of custody must be unbroken: every transfer records the handler, date, time, and purpose.

  • Wet biological evidence is air-dried, then packaged in paper; non-biological items may be sealed in plastic; sharps go in rigid containers.

  • Every package is labeled with case number, item number, date, time, and the collecting officer's name.

  • Firearms are rendered safe and unloaded before packaging; record make, model, caliber, serial number, and condition.

Quick reference

Emergency Response and Incident Command Basics

  • The first-arriving unit becomes the initial Incident Commander and remains in command until command is formally transferred.

  • ICS command staff: Incident Commander plus Public Information Officer, Safety Officer, and Liaison Officer.

  • ICS general staff: Operations (does the work), Planning (builds the plan), Logistics (provides resources), Finance/Administration (tracks costs).

  • Span of control: 3 to 7 subordinates per supervisor, with 5 considered optimal.

  • Unity of command: each responder reports to exactly one supervisor, preventing conflicting orders.

  • NIMS requires common terminology and plain language so that agencies can communicate without agency-specific codes.

  • Initial size-up: facts, probabilities, own situation, decision, and plan of action; then secure the scene, set perimeters, and establish staging.

Quick reference

Terrorism Awareness and Physical Security

  • Terrorism: unlawful use or threatened use of violence to intimidate or coerce a government or civilian population for political, religious, or ideological goals.

  • Pre-incident indicators: unusual surveillance, photography of security features, elicitation of employees, testing of security, dry runs, and unusual acquisition of materials.

  • Suspicious activity reporting documents observed behavior and circumstances, never identity or group affiliation.

  • Layered security: perimeter → building exterior → interior → critical asset; breaching one layer must not expose the target.

  • CPTED principles: natural surveillance, natural access control, territorial reinforcement, and maintenance.

  • WMD/package indicators: unexpected powders, vapors, mists, unusual odors, leaking or abandoned packages - do not touch; isolate, evacuate, notify.

  • VBIED indicators: a vehicle sagging under load, visible wiring or containers, fuel or chemical odor, and unattended parking near entrances or crowds.

  • High-risk target types: symbolic sites, critical infrastructure, transportation hubs, mass gatherings, and government facilities.

Quick reference

Ethics, Professional Conduct, and Public Relations

  • Ethics screen: Is it legal? Is it within policy? Would I defend it publicly? Would I accept it done to a family member?

  • Truthfulness is a continuing obligation; dishonesty in any official matter destroys testimony credibility and can end a career.

  • Duty to report misconduct - including excessive force, dishonesty, and criminal conduct by colleagues - to a supervisor or internal affairs.

  • Bias-free policing: enforcement decisions rest on behavior and credible information, never on race, ethnicity, religion, national origin, gender, or sexual orientation.

  • Procedural justice: voice, neutrality, respect, and trustworthy motives increase compliance and public confidence.

  • Conflicts of interest (personal, financial, or family) must be disclosed, and the officer must withdraw from the matter.

  • Confidentiality: information about ongoing investigations, juveniles, victims, and protected personal data is not released outside authorized channels.