Builds on: Advanced Electronic Evidence (Part 1): Collection, Imaging and Recovery
CCTV, Video, Images and Audio
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A camera saw it. That sounds like the end of the case. It is the start of careful work. Video is lost in days, exported badly, stamped with the wrong time, and "improved" until nobody can say what it shows.
Focus: get the recording as the system made it, fix the time, keep the first copy safe, and know what a picture or a voice can prove. This unit is general knowledge. It is not legal advice, and it does not train anyone to operate forensic tools.
Learning objectives
- Collect CCTV in its native format, with the player, before it is overwritten.
- Measure and record the time offset of a recording system.
- Explain the difference between the original, the first copy and a working copy.
- Say what an authentication examination can and cannot show.
- State the limits of enhancement and of voice comparison.
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