Some police agencies (NYC, for example) collect DNA samples on arrest. And if you're found not guilty, the arrest was wrong, or whatever, they still keep the DNA forever. [1]
But it's not like they conduct knock-and-spit dragnets. Oh, wait... [2]
Even worse is that social service agencies do it. Don't be born in California, because the fact that you suddenly exist means the state gets your DNA. [3]
https://www.nytimes.com/2019/08/16/nyregion/newyorktoday/nyp...
https://www.newsweek.com/police-dna-database-nypd-swab-testi...
https://sanfrancisco.cbslocal.com/2018/05/08/california-biob...
As sibling asserts, no you may not refuse. However:
> State law requires that parents are informed of their right to request the child’s sample be destroyed, but the state does not confirm parents actually get that information before storing or selling their child’s DNA. [0]
[0] https://sanfrancisco.cbslocal.com/2018/05/08/california-biob...
> The gig is up.
Absolutely. Also the Pentagon has another excellent source: It stores DNA fingerprinting for US armed forces personnel (so as to identify the remains of MIA/ KIA soldiers). If you could get your hands on that it would probably help fill in the family trees of people involved in intelligence work - I think it is fairly common for extended families to have lots of people working in defence and intelligence.
Presumably the Chinese can combine the family trees from these DNA databases with information from scraping Facebook/ LinkedIn etc and data from the Office of Personnel Management breach. IMO they should be able to connect DNA samples to people in the US very effectively, the DNA will map to a person or a few people and the Chinese will know the work - including intelligence work for the US government - that those people do. So, for example, if they pick a suspicious USB key or document they can take the skin cells of those who handled the object and identify them.
https://news.ycombinator.com/item?id=3722982
Unfortunately felons don't get a say in the matter but the rest of us do.
The gig is up.
It's a law felons give their DNA in some jurisdictions. Felons have families. Felons have great grand mothers. Felons have 2nd cousins. There are 6.1 million felons. I'd image the US is pretty much mapped out by now.
https://www.legalmatch.com/law-library/article/mandatory-dna...