I read that pamphlet but I have to admit that it did not give me an impression that law enforcement could use the data.
“A 2018 statewide CBS News poll found that three-quarters of new parents who were surveyed had no idea the state would store the leftover blood spots indefinitely for research or that they would be accessible to law enforcement.”
It is also interesting that they are no longer tracking said access anymore, so there is no way to confirm or deny their claims of “rare” instances.
[0] https://www.cbsnews.com/amp/sacramento/news/right-to-know-ca...