Yes, they have, which lends credence to LarryLied's theory that the Rats are using her as a distraction.
Remember, no one associated with the Clintons ever escapes with reputation and fortune unharmed. If Martha is smart, she would throw herself on the mercy of the DOJ and turn on them all, for they are surely turning on her.
I would really like to have a "600 degrees of separation" chart of all the people who have come within twenty feet of the Clintons, only to be investigated.