Objective. Students will produce a narrated walk-through video of a staged indoor scene that follows a systematic path, keeps the camera steady, and provides clear verbal identification of every item documented.
This lesson, its worked examples and its practice questions has not yet been verified by a licensed professional in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.
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Still photographs capture individual moments, but video captures continuity — the spatial relationships between items, the layout of a room, and the path an investigator took through a scene. A well-produced walk-through video allows detectives, attorneys, and jurors to mentally enter a scene they never visited. For that reason, video must be planned, systematic, and narrated clearly. A shaky, silent, or out-of-order recording can actually harm a case by creating confusion about the scene's condition.
Every walk-through video begins before the camera moves. While holding the lens on a neutral reference point — often the exterior of the entry door — the operator speaks a complete entry narration aloud:
This narration becomes part of the permanent record. If any detail is wrong, stop recording, state the correction on camera, and continue. Never splice or edit crime-scene video after the fact — doing so raises chain-of-custody questions and may compromise the recording's admissibility.
Once the entry narration is complete, the operator enters the scene and follows a consistent, pre-planned path. The standard approach is a clockwise circuit of the room, beginning from the primary entry point and returning to it. This mirrors the same systematic approach used in still photography and sketch work, so all three records align.
Move at a slow, deliberate walking pace — roughly one step every two to three seconds. Keep the camera at a stable height (approximately chest level or on a stabilizer) and pan slowly enough that each wall, surface, and item is legible in the frame. A pan that sweeps from one wall to the other in under two seconds is too fast for a viewer to process.
When you reach a piece of numbered evidence, pause the walk, zoom in slowly to a close-up, state the item number and a brief description aloud ("Item 4, brass cartridge casing, located approximately two feet from the east wall"), and then return to your working distance before continuing the circuit.
Uncontrolled camera shake is one of the most common errors in crime-scene video. It makes footage difficult to watch and obscures detail. Practical controls include:
If a stabilizer is not available, a slow walk combined with the two-handed grip is adequate for most indoor scenes.
After recording, play the video back immediately on site before the scene is altered. Use a structured self-review checklist to assess:
1. Entry narration — all required elements present
2. Clockwise path — maintained throughout
3. Camera shake — absent or minimal
4. Each numbered item — verbally identified on camera
5. Close-up pause at each item — completed
6. Audio clarity — narration audible over ambient noise
If the playback reveals a missed item or inaudible narration, record a supplemental segment on the same file while the scene is still intact. Note the supplement in your written log.
Before entering any scene for documentation:
Drones (unmanned aircraft systems, or UAS) are increasingly used to document outdoor crime scenes, crash sites, and large search areas. In the United States, operating a drone for commercial or government work — including crime-scene documentation — requires the remote pilot to hold an FAA Part 107 Remote Pilot Certificate. Key points every forensic technician should understand:
This course does not conduct live drone flights. Understanding what aerial documentation adds — and knowing the legal requirement to have a certified operator — is the competency required at this level.
Answer each question, then check it. Nothing is recorded; this is your own practice.
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