This crackpot has been keeping souvenirs from corpses and using them as a visual aid to promote anti-vaccine nonsense. After death, blood circulation stops and the different components settle out in the liquid. This can be useful forensically to determine things like the positioning of a body shortly after death in cases where a homicide victim was later moved, for example. The stuff in the sample jars took the shape of the blood vessels it was in after death and the lack of typical red coloration is due to the difference in density.

CTE