Next, treat evidence like a limited resource: once it is moved, cleaned, or discarded, it may be gone for good. You can keep production moving by flagging likely evidence early and setting up a simple, repeatable way to secure it.
If you do one thing, do this: identify and isolate first, then document, then move. The common mistake is to start demo and bag “debris” before anyone has marked what might matter, which can create avoidable disputes later.
In practice, your first walkthrough is when you have the clearest picture of what looks original, what looks altered, and what looks like a heat source. You do not need to decide the cause, you just need to recognize what could support it.
Start by flagging items and patterns such as:
Ignition area indicators like the tightest burn, deepest char, or most concentrated melt
Appliances and connected parts: cords, plugs, outlet faces, power strips, breaker labels
Wiring, junction boxes, and any splices that look recent or out of place
Batteries, chargers, e-bike or tool battery packs, and charging stations
Patterned damage like V-patterns, low burn, clean burn, or unusual directional soot
Items that were moved after the incident, such as fans, heaters, or extension cords
Works best when someone does this before heavy cleaning or demolition starts. Fails when a crew tears out a kitchen wall in the first hour and the outlet, cord, and device are all mixed into one debris pile.
So keep the process simple enough that a PM, lead tech, or contents lead can do it consistently. If you are short on time, skip detailed narration and focus on 10 clear photos plus a clean log entry.
A basic chain of custody can be:
Label: assign an evidence ID (for example, “E-003”) and write the location it came from (room, wall, height)
Bag: use a clean bag/box, keep parts together, and avoid over-handling
Secure: place in a designated locked bin or a taped-off shelf that is not used for daily debris
Log transfers: record who collected it, who moved it, when, and why
Document condition before moving: photos of all sides, close-ups of connections, and a ruler or tape measure in at least one frame
For example, if a technician finds a melted charger near a bedroom outlet at 9:20 a.m., they can photo it in place, mark it, bag it, and log the transfer to the PM before noon, while the rest of the crew continues dry-out and containment. That small habit protects the job file without stopping production.