Changeling blood from floors and gibs doesn't react to heat.

[cyberTripping]

I could have sworn I've seen smart detectives pop a shot at super suspicious runners only to use their floor blood to confirm ling status with booze. I always liked that. Loved it, actually.

I feel like the way this report is worded, it's specifically talking about the blood stains from a gibbing corpse, as a corpse leaves blood and gibs on the surrounding floors.