But it was a clear prohibition in her employment contract even if she had been so inclined.
My daughter was a chemistry grad student & same type of problem. The Arab students (mostly Saudi!) turned cheating on chemistry exams into an art form. They created a situation where efforts to stop them became so burdensome it impacted everyone. The university eventually just left it to the prof. Which eventually meant nothing was going to be done. The prof knew the university wouldn’t have his back if push came to shove. The school made too much money off these creeps to take any serious action !