Security Screening, Inspection, and Contraband Detection
This domain tests procedure at the screening point: legal basis, sequence, resolution of alarms, and documentation. Screening is where lawful inspection and unlawful search are closest together.
Legal basis and conduct
Screening rests on posted conditions of entry and the visitor's consent to be screened. Notices must be visible before the checkpoint. Body searches must be same-sex, conducted with a witness present, and limited to what the screening alarm or reasonable suspicion justifies. Never single out a person on the basis of appearance, ethnicity, or religion - that is both unlawful discrimination and poor security, because it produces false negatives.
X-ray interpretation
Most systems colour-code by material density: organic material typically shows orange or brown, inorganic material blue or green, and dense metal black. Train yourself to sweep the image for shape and density anomalies, not just colour. Items that look like components may be disassembled weapons or improvised devices.
Walk-through and hand-held detectors
- One person at a time, remove metal objects, feet flat, arms away from the frame.
- Alarms must be resolved, not ignored: localise with the hand-held unit, then a targeted pat-down if still unresolved.
- Keep the hand-held detector moving and close; sweeping too fast misses small items.
- Never reach into a bag yourself without the owner's presence and consent; ask the owner to open it.
Contraband categories
Prohibited items (firearms under RA 10591, bladed weapons, explosives, illegal drugs, flammables) versus restricted or regulated items allowed only with authority. Record every seizure, including item, quantity, time, and the two persons present.
Worked example
A walk-through detector alarms on a visitor's hip. The guard asks the person to step aside, uses the hand-held unit, finds the alarm localised at the belt area, and asks the visitor to empty that pocket. The visitor produces a small folding knife. The guard does not reach into the clothing, records the item, and follows the site's turnover procedure. Each step resolved the alarm instead of assuming it was a false positive.
Traps that cost marks
Treating an alarm as a finding; failing to resolve an alarm at all; searching without a witness; profiling; letting a visitor leave with the item unrecorded.