I saw your other post about commingling of accounts. I'm guessing its related to this matter. The victim of the embezzlement is obviously concerned that the proceeds were used to benefit the daughter, and is interested in locating and re-possessing those funds.
I don't know what case law you're looking for. There is case law out there to the effect that funds gained through breach of trust can be "traced" into commingled accounts. I don't know your jurisdiction, and unless it's Canada, none of the case law I could cite you would be of particular use.
I guess the embezzlement is a done deal, and the only issue is whether the victim can recover from the daughter? Then her daughter should hire a lawyer. Or give the funds back, since they are ill-gotten in the first place.