Hi James,James Hall wrote: ↑Thu Mar 01, 2018 3:25 pm Investigative
Urine, chemicals, salts, areas where paint has been removed and other residues can be seen in laser scans because it can change the light reflectively of the surface. For me it is most often seen on concrete. I've identified non visible paint stripes on airport runways by adjusting the display characteristics in Cyclone. When we scan a parking garage, we pick up all kinds of stains, oil , salt, and urine mostly.
I'm not a forensics guy, but looking at how different substances affect your scanned surfaces might be useful for your discussion.
James,
Your findings here are really interesting. Forgive me I am not massively clued up in the capabilities but do you think it is possible pick up different residues after they have been burnt? for example in a arson case, a burnt wall vs a burnt wall that had blood or ignitable liquids before
Best Wishes,
Scott