Was it the Asians?

Business Insider: Foreign students studying at US universities are seen to cheat more than American students, according to a Wall Street Journalanalysis.

Citing data from 14 large public universities, The Journal noted that public universities recorded5.1 reports of alleged cheating per 100 international students, compared to one report of cheating per 100 American students.

The Journal requested data from 50 different public universities with student bodies heavy with foreign enrollment, though only 14 were able to provide complete data for the 2014-15 academic year.