BBCNEWS Click February 19, 2022 01:45:00
Canisters filled with a smart water to victims of domestic abuse, harassment, and stalking. and if it is sprayed on a person, it can put them exactly at the scene of a crime. each batch at the liquid has a unique formulation. at this lab in telford, they mix together different chemical elements and there is more than a billion possible combinations. the technicians can analyse the tiniest of samples so from just one drop of this stuff, they can tell exactly what bottle it came from. well, i cant...
Source: archive.org