The title should more properly read:

"Gerrymandering lawsuit stunner: Daughter of deceased GOP mapmaker turns over his documents to Common Cause **one month after receiving a subpoena ordering her to do so**"

It's still a major development in the case and quite helpful, but a lot of people are clearly incorrectly inferring from the title that the daughter did this voluntarily. It's unclear whether she was for or against this release, and was merely complying with a lawful order, as far as I can tell.