Is there any precedent of subpoena-ing chat logs, or locale information, based on (illegally obtained information of) a missed period; or is this Handmaid's-Tale-fantasy territory?

> illegally obtained information

It's not illegal to purchase bulk data without a warrant. [1]

It should be.

So yes, there is precedent of prosecutors buying bulk data and using it in prosecutions.

In fact, that's basically a huge part of the "value add" of palantir.

[1] https://www.npr.org/2026/03/25/nx-s1-5752369/ice-surveillanc...