Job Recruitment Website - Immigration policy - What is the general reason for the doctor being investigated?

What is the general reason for the doctor being investigated?

Specifically, you should ask the ISSS office of the school, which is subject to the regulations given on the website of the US Immigration Service.

In my impression, if you didn't apply for OPT, and the start date of the new I20 is after July 15, then you need to leave the United States before July 15, because your I20 is your legal residence document in the United States.