The impression I got, based on the poorly written email, was that the 2 professors came together to speak to her about the noisy students. And from what I have read, the email from last February followed some “recent report” (the article had that in quotes), whatever that means, that came from the Department Chair, Elizabeth DeLong https://www.dukechronicle.com/article/2019/01/duke-university-china-2018-email-megan-neely-grad-program-director-who-stepped-down-also-sent-email-in-2018-telling-students-to-speak-english