Forget “definitive” evidence, how about “any” credible evidence at all? What we have is supposition.
A lifetime appointee is not a great blackmail target.
He didn’t vote how we wanted a couple times? I think horse, not zebra.
Sometimes all we can go by is a gut feeling that something is very amiss. Believe me, I’ve had more than a few “gut feelings” over the years that have turned out to be true.
His “ruling” on ZeroCare smacked of something very wrong, and gave off the strong appearance of blackmail (or threat). His lifetime appointment doesn’t matter here. If he came out and admitted he broke laws with respect to adoption in order to halt the blackmail, he’d be forced out and Zero would’ve appointed a successor. This was a win-win for the blackmailers (obviously Zero’s people).