"Langley said she would request her transcripts as proof of enrollment at Cornell, but was told that a freeze had been placed on the documents because someone posing as her prospective employer was calling the university to obtain them."

 Cornell ONLY sends transcripts to the student whose name is on the transcript.  Anyone who has requested a transcript knows this.  The procedure for getting a transcript to an employer is to have the transcript mailed to yourself.  (I did this and my transcript arrived today in a sealed envelope.)  In order to give my transcript to a third party and have them know it is genuine, there is a clear notice on the envelope that says, 
         OFFICIAL TRANSCRIPT OF RECORD
                   CONFIDENTIAL
                  UNOFFICIAL IF SEAL IS BROKEN
Caltech (where I received my second degree has exactly the same procedure.