An inquiry began when a tutor noticed identical answers to a take-home exam for an undergraduate politics course.

BBC: Harvard University file picture

The cheating scandal in which Harvard punished dozens of students for copying one another's answers on a take-home exam was disclosed last August.

WSJ: Harvard Explains Secret Email Search

More than a hundred students were investigated for plagiarism or for having "inappropriately collaborated" on a course's take-home, open-book spring final exam.

CNN: Harvard apologizes after secret e-mail search