Keep original files
Retain original image and video files with metadata. Make working copies rather than cropping or annotating the only version.
Identify short-lived evidence
Surveillance, vehicle data, access logs, and inspection records may be overwritten. Record who may control them.
Protect physical items
Keep damaged property, clothing, footwear, packaging, and instructions in a safe place until a qualified adviser explains what matters.
Build a simple index
Create a dated list of what you have, where it came from, and where the original is stored. Do not fill gaps with guesses.
Questions about this step
Is this guide legal advice?
No. It is a research and organization tool. A qualified lawyer must apply local law to the specific facts.
Should I wait until every record is available?
No if timing may matter. Preserve what you have and ask what else is needed.