By “evidence, do you mean videotape of sex acts?
In that case, there’s no evidence. That I know of.
But the “charge” is universal knowledge. It was universally known long before the internet. You can Google “a twirl with Wuerl” and “Donna Wuerl.”
So, I did google twirl with Wuerl. My only question with that would be, why would any self-respecting man have a twirl then tell about it? It would seem to me a complaint would be made to higher HQ, etc.
I don’t expect videos, etc. Rather, any number of “universally known” things are often false, e.g., Herbert Hoover as cross-dresser, Joe McCarthy was on a witch hunt, etc.
Because it is a charge that can be disputed, the tie goes to the Cardinal (on this point).