There’s not a lot of information in that story to draw a conclusion but Lehigh is a competitive and very well respected liberal arts college. This sounds like a disgruntled student who has come back and tried to get something changed after she found it is having a negative affect on her career. It seems to me that it would be very difficult to prove the charges she has brought. Lots of A students get an occasional sub-par grade. My eldest just graduated from a school very similar to Lehigh and had straight A’s except for one B-, so the fact that this one grad deviates from her usual performance is proof of nothing.
I am always a bit suspicious of cases like these. Too many people try to blame others for their failures. Its the entitlement society we live in that seems to have gotten worse with each generation. When my brother was in med school he and his friends noticed some blatant cheating going on. They reported it to the professor and the next exam the proctor caught the two students in the act. To the schools credit the two students were expelled, but shortly after they got lawyer and put a story in the paper that they were the target of jealous students. A week later my brother and the other students who reported the cheating were sued and served with summonses. To add insult to injury the summons were served in school in the middle of an exam. Too many people today just don’t take responsibility for their own actions.