isn’t a reliable worldwide dictionary saying “red means this,” “blue means that,” or “yellow means something else.”
Even reports that discuss alleged marking systems acknowledge that meanings can vary and that not every unusual marking is connected to criminal activity.
So don’t panic simply because the substance happens to be red.
What Should You Do If You Find It?
You can take a few sensible precautions without assuming you’re being targeted.
1. Take a Photograph
Before cleaning anything, photograph the mark.
This gives you a record of what you found
