Received a call from this number, also got a partially clipped message mentioning prison time. Called back, got an answer but no explanation to who they were, and then they put me on hold.
Had a call from the 'Department Of the United States Treasury' from 'Officer Rachael Smith' claiming a 'Federal Lawsuit' in a 'Federal Claims Court'. The return call back number was 707-687-7678. Did some quick checking and found this to be scam. Did not call back the number.