Benjamin
I suppose if they are just trying to make us think they have Potter out of the mirror, they could have planted the information. But- that's awfully subtle if they are trying to get a message to us. Yaxley was holding the Imperius, and he's trustworthy. I'm sure he kept close tabs on Thicknesse, I can't imagine that he would have been able to get that close to Order members with out Yaxley knowing, but we can't really ask him, can we?