WOW.

I think if it were me, I would probably sit with the information for a few days or a week or two - because sometimes once I've had time to digest something, I see it differently. If I still felt really alarmed and distrustful after that, I would HAVE to bring it up. This is public information that you stumbled across by accident, but that has real potential to affect your therapy, if it makes you feel that you can't trust your therapist.

But, I would guess that if there is an ongoing legal investigation, she will refuse to talk about it.

Wow. I guess I really don't know. What a difficult situation to be in.

All appropriateness aside, what do you WANT to do?