Catching students cheating with R

Matthew Crump, a psychology professor who discovered high volume cheating in his class via WeChat, outlines the saga in five parts. Bonus points for use of R to analyze the evidence:

I do a lot of teaching on using computational tools for reproducible data analysis. I can input some data and run it through a script for analysis. When the data changes I can run it through the same script and get the new analysis. The chat archive had changed and this time it was easier to do the analysis all over again. I redid all the counts of academic integrity violations and rewrote the forms spelling out sanctions for each student. So many forms, I died a little inside once for every form.

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Source: Data