No idea what they're on about, but evidence in a crime is sealed and unsealed for examination and forensics. 'Accidental' contamination can occur and cause a case against someone to be damaged.

I don't see how evidence in a trial being contaminated can be a form of provocation unless they're talking about something in the Rittenhouse trial coming out that there was tampering with evidence or something.

Or they could be referring to evidence being contaminated in the current Ghislaine Maxwell trial where she's apparently so worried and taking the charges so seriously as if she might be found guilty that she's spending her time in the court room making sketches of the sketch artist.

Anything that feeds the media: anthrax, smallpox, radioactive contamination ... The aim will be to scare and displace the population by using panic. At the same time, the narrative will talk about contamination of occupied Palestine and circumcised parasites will be transferred to the territory of Europe.